Well I think the nxt revolution will have to happen in the heads of humans. Not only, because of environmental topics, but just because right now about 5 Billion people are poor and among them 2 Billion suffer from water shortage and 1 Billion of them also starve. Just imagine every 3,6 seconds one child starves to death. So 24.000 per day or 8,76 Million per year. And these are only the children, in addition also some million grown ups starve to death every year.
And when we keep on destroying the environment the food problem will increase. Just imagine that today the fish population in the sea is today only 2% of what is was at the beginning of the last century.
What will be left at the end of this century?
We run out of food if we do not take care. Even in the agriculture sector the soil is so destroyed, that it already requires massive fertilization.
And when we eat food that was produced in this way, then we eat all the chemicals that harm our DNA and may create cancer etc.
Wel but I am also an optimist. If we would use more good technologies, then there will be a tech revolution. In Germany we already have science and machines to turn deserts into arable land, but we are not giving such techs for free, but only for high profits.
Mankind could turn the Sahara, the Gobi desert and several small deserts into arable land if mankind would switch to a more wise economic system.
Also look at the planets in our solar system. Even if it takes centuries, one day mankind will win there resources and produce there food.
We do not have to waste our own planet, we could use the uninhabited planets to solve our resource demands. The technology does already exist, but the problem is that many companies demand high profits.