Caution : this section is long. 5000 words ahead:
Linear Induction Bike Lanes
Electronic bicycle lanes could also be constructed to incentivise cycling. A linear induction motor, laid into or on the cycle lane surface could pull cyclists along if they wanted assistance. Mechanical energy is very cheap, whereas the effort required to cycle long distances or up hills is a strong deterrent to many potential cyclists – they are not all super fit! This linear induction drive would only require a small modification to the bicycle (a simple metal plate affixed to the front forks would probably do), and could easily be switched on and off, could offer variable speeds for individual cyclists. Bikes would be pulled along by the magnetic field. It is quite easy to engineer in various safety precautions to prevent misuse and also to enable charging to make commercial ones viable. With no moving parts, and therefore nothing to clog up, it could be extremely reliable. Tracks could be laid either into the surface, or made as rolls that could be quickly laid out on hills to give extra assistance where it is needed. Of course other technologies such as RFID chips could enable highly personalized control (and payment) systems. Apart from encouraging more bicycle use, it could also be used to increase bicycle speed, which both improves journey time for the cyclist, and reduces the congestion bicycles can cause in other traffic. Making it easier to use bikes, and enabling people to use them to commute without needing a shower as soon as they arrive, would yield system wide benefits through extra bicycle use and increased fitness and because speeds would be higher, they wouldn’t slow down other transport as much or cause so many accidents.
Self-driven Pods
New transport solutions based on electronically driven cars and electronic highways could be developed quickly. The basic technologies are all proven now. Cars in the far future will simply drive themselves. These could dramatically improve personal mobility and social inclusivity, and greatly reduce congestion. People would most likely abandon car ownership if this is done well. If personal driving style is eliminated by electronic overrides, there is far less incentive to personally own a car, and at the same time it will become much easier to implement and manage large fleets of shared cars. Fleets give economy of scale and also far better economy of resource. A car would not spend most of its life idle, but could be in use most of the time. A modest number of cars could cater for a large population, especially since the exact locations of all the cars is known, as well as the destinations and likely arrival times of cars in transit. There are already several instances of car rental systems that allow people to just pick up and drop cars as they wish. This will become much more attractive an option with future technology.
So we may well see large fleets of shared cars, owned by companies, government or social groups. With cars linked electronically into a ‘road train’ for acceleration and braking, they could drive closer together, increasing road occupancy, reducing drag and making road travel more energy efficient. With computers driving the cars, they could be much closer together sideways as well as lengthwise, squeezing more lanes onto the same road area, so it may be possible to increase the number of cars on a stretch of road. Given smaller pods instead of large cars, narrower lanes and closer distancing, it should easily be possible to achieve a factor of 5 in the number on a stretch and since they could all be moving well, overall capacity would improve even more. It also makes it more feasible to run roads with lane direction determined by time of day, with some lanes carrying cars one way in the morning rush, and the other way in the afternoon.
Obviously, lorries need more road space but this can easily be accounted and flow still optimised by a computer driven system. Lorries are already being developed that can work in road trains to save drag and driver fatigue.
Such an electronically controlled system could have a mixture of public and private (large fleet company) ownership. The key feature is that it will have all the flexibility of private transport but be more socially inclusive than current public transport, since older people wouldn’t have to walk to a distant bus stop. All they would do is ask their computer to get them a car.
Car batteries are an obvious storage solution for intermittent energy supplies such as wind or solar energy. However, if direct power pickup from road surfaces is implements, and it is likely, then batteries would not need to be very high capacity, since they would only need relatively short local reach. Using smaller batteries would greatly reduce the need for lithium and other materials, making cars cheaper, lighter and safer.
Buses would be a big spoiler for such a system. Since they have to stop frequently to let people on and off, it would be far better to replace them with individual pods. Each person would get personal service door to door and the reduced size makes it far easier for computers to organise flow around them as they stop. In fact, they may even be small enough to simply use pavement. Few people would miss slow and dirty buses or the risk of having a drunk sit next to you, when faced with the option for comfortable end to end service at probably lower cost.
A public transport system like this would require far less resource than today’s, because far fewer vehicles would be needed, and they would be lighter so need less raw material, and drag would be much lower, so they would use less energy. It would also be safer, cheaper and more socially inclusive by far than what we have today.
Rail use – pod trains
There is really no reason why these self-driven pods or road train technology could not be implemented on the railways too. Rail occupancy can be as low as 0.4% on regional railways. Performance analysis shows that packet switched networks can be safely loaded to 80% occupancy before statistics cause significant performance degradation. So there is clearly a huge opportunity for improving the capacity of railways, perhaps 100-fold, if packet switching based solutions were to be implemented instead of the current system, which allocates a very long stretch of track exclusively to each train because of the safety limits required by the obsolete signalling and control technologies that current railways use. Suppose that electronically driven cars and buses could be taken onto the railways, and interleaved with vans and small rail carriages that spend all their time on railways. For example, cars could be made with dual wheels, as some buses are today. Once on rail, no steering is needed and with the vehicles talking electronically to each other to coordinate braking and acceleration, the driver could do other things while the car drives itself to the destination station, whereupon it would leave the track and use its other wheels to get to its final destination. The cars could be driven very closely, and of course the drag and friction costs would be very low. Furthermore, since most of the journey could be on rail with electric energy easily provided, the car could use an electric motor. Instead of using petrol or diesel, or even fuel cells, it could make very long journeys just on batteries, since the batteries could be recharged during the rail journey. Since railways are simple one-dimensional systems, this would be far less demanding in terms of control systems than the equivalent on the roads. So whereas electronic highways will take some more years to become feasible, rail based systems could be implemented much more quickly, given the will.
Nuclear energy – Thorium
Many environmentalists are in favour of nuclear power compared to a few years ago. Nuclear power has always been a scary option to many people because of the waste disposal problem, and the potential use of some kinds of nuclear power stations to generate material for bombs. Nevertheless, if it does turn out that CO2 emissions are a problem, then it offers an obvious way of reducing them while providing much more stable power than that available from wind, wave or solar.
Today’s nuclear stations mainly use uranium, a few use plutonium, but tomorrow we will probably have many that use thorium, a relatively common element that is cheaper and more readily available than uranium, and produces much less dangerous by products as it decays. The Chinese are currently trying to develop thorium reactors and are likely to succeed. If so, this will provide a great deal of help in achieving a sustainable world that still has enough energy for us all to lead comfortable lives.
In the longer term, fusion based energy is inevitable too, but no-one knows when this is really likely to become reality. The very far future has a glut of potential energy supplies, so it is only the short and medium terms that are threatened with shortages. Long term sustainability is not a problem as far as energy goes.
Nuclear waste disposal
Uranium comes from mines. It is extracted, concentrated, used until it isn’t radioactive enough any more and then we lock it in secure dumps until we figure out what to do with it. One option seems obvious when you remember that it came from a mine originally. If the nuclear waste it replaces were to be extremely diluted by mixing with the refuse from the uranium mine, (or indeed with any other rubbish if it is being used for landfill), then it could all be dumped back in the hole it originally came from, and that would result is a slightly less radioactive mine than the original.
A longer term option lies in the space elevator. Nuclear waste could be flung into the sun, which of course is just a nuclear reactor anyway. It could be an expensive solution compared to burying it or using it up in a thorium reactor, but who knows?
Wind energy
If there is one perfect example of the triumph of green dogma over scientific sense, it would be wind farms. Wind farms can harness superficially free energy but are an eyesore, cause noise and stress, disrupt breeding cycles and kill birds, and may even sap enough of the wind to disturb natural weather patterns. They are ludicrously expensive to build, with little scope for cost reduction requiring heavy subsidies. Because wind doesn’t always blow, they still need other power generation capacity to be provided alongside, and this also needs to be subsidised if the generator companies can’t sell their power all the time. Overall, wind farms as they currently stand are anything but green and should really be a last resort.
There are a few developments that will make wind energy slightly less awful though. One is the use of different kinds of turbines according to the deployment circumstances. Vertical axis turbines may be better in turbulent environments such as housing areas, whereas conventional fans cannot harvest efficiently when the wind direction changes frequently.
Super-capacitors made of novel materials such as graphene offer the prospect of being able to store energy more easily, solving one of the big problems with intermittent energy use.
Plastic capacitor sails
Also on the capacitor side, plastic capacitors change their capacitance as they deform. Wind energy harvesters can be made using large sails covered in millions of tiny plastic capacitors that spin in the wind, deforming and springing back every time they make a rotation. The sails would lie on the surface of the sea, and only become visible when the wind fills the sail. There would be no visible movement from any distance away because of the small size of the capacitors, so this would doubly help visual disturbance. Since the energy would be converted more directly into electricity, there would be no need for a large central generator, no need for heavy engineering. The costs of plastic capacitors today make sail solutions even more expensive than conventional turbines, but materials science often follows Moore’s law cost reductions, whereas mechanical systems don’t. This means that in a few years it may be cheaper to use sails, and the cost benefits would continue to improve thereafter.
Whether such advances will ever make wind energy a good solution is uncertain, but it could be less bad.
Solar farms
Solar farms in equatorial regions are likely to spread, contributing enormously to energy supply, but affecting wealth distribution and already associated with crime and forced people movement. Short term costs are very high but inevitably will fall. They also increase absorption of sun’s energy relative to bare ground. So solar farms would produce a great deal of energy and could be cheap as Moore’s law brings down the costs and increases efficiency of photovoltaics, but it isn’t the clean solution sometimes imagined.
Graphene
Graphene is the new wonder material. Like carbon nanotubes, it is just another form of carbon, the atoms just laid out differently. Having said that, it is far stronger and lighter than steel, is a superb conductor, it can be used as a substrate for electronic circuits, and it is made of carbon, an extremely common element. Its importance in sustainability will come from many angles. To list just a few, it will enable substitution for other materials that are in short supply, expensive or dangerous or resource-consuming to make. It will allow super-capacitors that can replace batteries and store power from intermittent energy supplies. It will make ultrafast computers, better sensors, and many other things we haven’t even imagined yet. Engineers are very excited about its potential and it is impossible to know just how much impact it will eventually have, but it is likely to be huge. As a key pillar in future sustainability, graphene is certainly in there.
AI (artificial intelligence)
If we could produce intelligence synthetically, and therefore provide extra thinking capability to solve problems, this could have a profound effect on technology development rate, in every field. Since it is likely that this will be achieved in the next few decades, AI is a very important sustainability tool, with its enormous potential to invent solutions, increase understanding of the environment, and accelerate research development, but it is rarely mentioned in environment debates. Clearly, smart machines might be used to design smarter machines, which will design smarter ones still, leading exponentially quickly to vastly superhuman intelligence that may well solve many of the problems for us, with new energy technology, and new environmental clean-up and management technology.
We should not rely on AI to save us, but we may reasonably expect that it will, even if some man-made solutions fail. It gives us hope, but not enough certainty to avoid us using other approaches in parallel.
Active contact lens
My own invention in 1991, the active contact lens is a tiny display device that is worn as a contact lens, and contains circuits to project images directly onto the retina. It has already been prototyped in primitive form but in the far future it will offer ultra-high resolution fully immersive 3d images, and will make all other display devices unnecessary (though we may still have some anyway). Any kind of other display could be mimicked as a portion of the active contact lens display area. It is possible therefore to save all the resources and pollution involved in all the others. Given the number of TVs, mobiles, PCs, tablets and so on that could be replaced, the active contact lens can be a significant contributor directly to sustainable resource use.
In addition to replacing other displays, it can also be used for new services such as augmented reality. This allows even a basic environment to be enhanced virtually, and if the display quality is sufficient, it would be indistinguishable from the real thing.
Digital Jewellery
A person wearing a few grammes of digital jewellery in the 2020s will have far more IT capability than someone today with a laptop, phone, PDA, MP3 player, digital camera, GPS navigation system, security alarm, identity card, electronic cash cards, credit cards, voice recorder, video camera, memory sticks, radio, portable TV, a book, magazine, games console and many other gadgets that haven’t even been invented yet. Furthermore, by 2020, billions more people will be able to afford these sorts of things. These can also be the basis for a distributed cloud platform, requiring far less server farm provision and requiring far less power than today’s server farms. It is important that we get greater miniaturisation and lower energy use if everyone in the world is to have access to all the benefits of IT sustainably. Digital jewellery will be key.
Biomimetics
Biomimetics is simply using nature as stimulation in engineering design. Three billion years of natural evolution has come up with some great ideas, still being discovered. Engineers draw inspiration from these. Sometimes natural techniques and designs can be mimicked almost exactly, sometimes a bit of human tweaking is a good idea, but nature-inspired design is often lighter, stronger, faster, or better in some other way than alternatives. Biomimetics is another great sustainability tool. There are some purists in the field who like to stay true to nature, but as far as sustainability goes, it is great to get ideas wherever they come from, and nature is a big source. Even if the end product looks nothing like nature, its initial inspiration can be important.
Biomimetic architecture has been around quite a while, enabling low power air conditioning systems for example, or skyscrapers that can be lighter weight, or use lower drag materials to reduce wind pressure. There are very many opportunities here.
Synthetic Biology
Synthetic biology can be seen as a major derivative or biomimetics. Engineers and scientists have been discovering how nature works at microcellular and even molecular levels, and are now copying and using even genetic tools. At first, the major headlines are in modifying DNA slightly or assembling genomes from off-the-shelf chemicals to create synthetic bacteria, but it will undoubtedly progress to designing whole new classes of proteins, genes, and different types of synthetic organisms. It will also allow us to modify and enhance existing ones. Proteins are nature’s machines, and by understanding how to design and build them for our own purposes, this will be a rich seam for future development.
However, it is not without risk. Messing with nature will allow us to fix a lot of environmental problems. But as it becomes better and eventually commoditised, it is also a tool that lends itself well to the military, terrorists and mad scientists. I would say synthetic biology is in the top three tools when it comes to achieving sustainability, but I’d also put it in the top three risk to life on earth. If we can harness its potential while protecting against its threats, we will have a much better world for sure, but that is no easy task.
Bacterial mining
One example already under way is bacterial mining, designing bacteria to break transform a fixed resource (coal in this case) into a gaseous one (methane) so that it can be extracted more easily. Methane also produces less CO2 than coal for a given amount of energy. This clearly would help sustainability, as would many other custom bacteria. Other roles may be mining rubbish tips to recover useful elements from them, extracting resources without digging big holes and ruining ecosystems; processing waste; fixing carbon; making algae fuels; changing the earth’s albedo and many others. Again, the dangers are possible harmful but unexpected interactions with the environment (and it certainly wouldn’t be the first time we have had unexpected reactions), or commoditised advanced uses being perverted for destruction.
Restoration of the environment to health via genetic technology, desert greening programs, weather control technology and so on, are all highly likely to be developed over the next several decades. Synthetic biology could also yield tools to rescue life on earth after environmental catastrophe, by eventually enabling wholesale redesigning of the ecosystem from the ground up.
Carbon Reefs
Most UK householders are already encouraged to separate plastic waste for recycling, and when it reaches the recycling centres, it is usually compressed into blocks for easier handling, which sadly is often done in China. If these blocks were instead to be dumped in the sea and suitably contained, just off the Norfolk coast for example, transport and processing would produce far less CO2, carbon would be locked up, coastal erosion would be reduced, land would be reclaimed, and landfill would fill up more slowly. The plastic would effectively become a plastic reef and later, reclaimed land. This approach would be carbon negative, while recycling is at best carbon neutral. One of the obstacles to this solution is the move towards biodegradable plastic, which of course returns carbon to the atmosphere, and ironically, was developed to help the environment. Another is EU law which prohibits dumping plastic in the sea. Another obstacle is environmental groups who argue that we shouldn’t try to resist erosion because it will then happen elsewhere, but that is a rather defeatist attitude. Put some of the blocks there too.
The much levied criticism of conventional plastics, that they will stay around in the environment for thousands of years, actually makes them ideal for a carbon sink. Bio-degradable plastic, and current laws that prevent plastics from being dumped in the sea could turn out to be environmentally damaging, by preventing such solutions.
Some other waste could be mixed in too. For example, glass is borderline recyclable, yielding a environmental benefit when recycling it rather than producing it from scratch, but since this full-life benefit is actually quite small, perhaps it could also be included with the plastic, giving extra density to the waste.
Even organic waste could be processed by heating with reduced oxygen so that it carbonises, giving off natural gas in the process that could be used as fuel. The carbon could be added to the plastic reef to help absorb toxins from the seawater, cleaning it up a bit too.
Fabric Technology
New fabrics that don’t need to be washed are making their way onto markets already. It is the norm for clothes to be washed of course, and not everyone will be happy wearing clothes without ever washing them, but gradually acceptance is likely to grow. Washing machines that require far less water and detergent, and wash at lower temperatures are of course already here, and we will see their penetration increase too. All of these are useful tools in the battle for sustainability.
One of the first fabrics to be released is treated cotton. This is quite ironic, since cotton production is extremely water intensive and polluting. But it is still a start.
We can expect more and better synthetic fabrics in the future of course as well as treatments for natural fibres. Some of these will reduce environmental footprints by keeping us warm and dry and clean while reducing consumption of raw materials, water and energy use. Genetic engineering is likely to improve natural fibres too or make them easier to produce without so much water.
Carbon sequestration
Solutions for carbon sequestration can be developed quickly if we need them. As yet, we don’t really know if we do and this could be money wasted.
Farming
Organic farming generally produces less food per hectare of land, which decreases global food production capacity, which increases prices and makes it harder for poor people to survive, forcing them to have more children, which creates a greater population, greater need for aid and so on. It is a Western luxury that is paid for elsewhere.
Organic farming products are often delivered by a different distribution system, which has different impacts and these also need to be accounted. Additionally, marketing for organic produce tends to reinforce other aspects of lifestyle and attitudes that affect the system in many more subtle ways. For example, as well as consuming ‘organic’ food, the same people are likely to prefer natural fibres instead of synthetic substitutes. This increases demand for cotton. Cotton is becoming a hot environmental topic in itself, producing pollution and water stress among many other socioeconomic problems. Again, the transport, CO2, energy demand and social impact is very different across the whole system and whole lifecycle from synthetic clothing.
Planes and alternatives
Cheap air travel is a strong focal point for environmental hostility, but it is generally better to solve the actual problem than just tackling a few of the symptoms. The real issue isn’t travel, it is the environmental impact of the travel. Future technology can even provide alternatives to planes if need be. And ultimately, there is no law of physics that says that travel has to use any energy. The whole planet travels 1.5 million miles every day without using any energy at all!
The airline industry is currently researching the potential for both battery powered and hydrogen powered planes. If the hydrogen is produced in an environmentally friendly way, then that would certainly be one solution that would keep air travel going without creating major environmental problems. More interestingly, taking futurology back 100 years, we find ideas that may just have been ahead of their time. At the turn of the 20th century, futurologists were suggesting long tubes through which people could be propelled in vehicles by compressed air. That idea is now making a comeback, with long tubes that use vacuums and magnetic propulsion instead of compressed air. De-pressurising the tubes reduces air resistance. Superconductivity will make these far better than is possible today. We do not yet posses the tunnelling technology to make such solutions viable on a widespread basis, but they may become viable for high speed city links in the not too far future. For overseas journeys, large plastic tubes might even work, suspended not too far below the surface. Again, once an object is moving, in the absence of friction, it will continue doing so with no power consumption. This could be a very low energy transport solution one day, or perhaps it will be still a curiosity in another 100 years.
Yet another novelty is the idea of using super-cavitation to allow supersonic submarines. It has apparently been demonstrated that high speed travel through water can be done with less resistance than through air. This effect has already been used for torpedo technology.
Virtual existence
Estimates of future population generally only include humans, but we won’t be the only intelligent beings on the planet much longer. Advances in AI promise to make sentient AIs in a decade or two and by the end of this century there will be millions or even billions of them, with a wide range of intelligence levels and characteristics. They will not only exist to serve people. Some will have a purposeful existence of their own, just as we do. They will have their own culture, and we will interwork with them. AI’s are potentially very diverse in nature, just as organic life is. We shouldn’t assume that they will all sit in rooms looking like computers, or even walk around as robots. Some will, some won’t. Some AIs will stay in the same place. But that ‘place’ could be the entire global network and any associated computer. They may roam electronically. They may also consume resources just like we do, for entertainment, research, building, arts, even growing gardens. We should not preclude AIs necessarily from sharing at least some human interests, as well as many we don’t have. But we can reasonable assume that many or even most AIs are produced to serve human interests. They may help a great deal with science and technology development, so may be extremely valuable in the fight to achieve sustainability. But there are some other lines of thought worth listing before moving on.
Science fiction generally presents robots as having their ‘brain’ on board. With cloud working today, this already looks dated. It is highly likely that robots will have a mixture of on-board and remote capability for processing, sensing, storage and communication. Some robots will essentially be empty husks waiting for occupation by any AI that is capable of occupying them. Or human mind for that matter, once our technology is up to the job. Direct links to the brain are extremely embryonic today, but by 2050, remotely occupying a robot and feeling senses as if you were present in it should be feasible, and if not by then, certainly not long after. This is an important factor for sustainability. It opens the possibility that people could carry on in machine form after their biological bodies die, or even have multiple parallel existences in different forms. It also allows an alternative for of travel, where you simply hire a robot at the destination and use remote presence to be there. There is little point in detail here since these technologies are too far away and will happen in a very different world from ours. It is enough just to mention them and move on, as I will now.
The full report is completely free and can be found at http://futurizon.com/articles/sustainingtheearth.pdf