Eye, If you actually look into this idea there is nothing on the horizon that replaces fossil fuel. Even Wind and solar use more fossil fuel to build and maintain and are not that great of a return. Electric cars are made with more fossil fuel than regular cars and most of the electricity they use to run on is from fossil fuel. Wind gens last only 20 years or so, Solar panels are only about 10 to 15 percent efficient and last about 15 to 20 years give or take. There is no technology on the horizon that can be developed to fly a plane that is not some light RC style plane that does nothing but barely lift itself. All this talk about dumping fossil fuel is a lot like the talk about going to Mars. Its not going to happen. Humans can not keep more than a small highly supplied group of people scientists at the south pole and there is water and air there. There are neither in enough quantities to keep humans alive on Mars. Its not going to happen. The idea that we cam make a utopian future denies the stupidity of humans. Not going to happen.
First off all nations would have to come togeather and stop wars and put religion on the back burner and stop most all births. At least for a while then once the population drops to about 4 billion or so only allow replacement births. Even China has had a hell of time enforcing that one and they are a totalitarian nation. So its not going to happen. The future is just bleak for humans. Past my sell by date. But its not gong to be good. There will be a dystopian future for the next generations.
There was a Town built out in the country where I used to live. It was going to be a sustainable city. Solar ect. They took us on a tour and showed us the Solar collectors. LOL I asked the guy after the tour WTH that amount of cells is not going to power the city. He said they may get enough to do the street lights. But its more of an idea than a city run on renewable energy. Solar and wind are BS. Look at California where they are having issues because the sun does not shine all the time and the wind does not blow all the time and even when they are running you must have a fossil plant idling in case of spike or solar not supplying enough or wind no supplying enough. Wind and solar are a joke.