Renewable energy is fast becoming the preferred way of mining CryptoCurrency like Bitcoin as prices rise the industry craves for Hashing power. This is why 4NEW is a welcome development.
We need a lot of energy with mining and stuff but with 4New we can use the waste to create energy. This is one good way to get rid of the wastes and have profit from it.
This is why I think the 4NEW project will be successful and will certainly change the cryptocurrency game if we can resolve the issue with energy/mining.
I think eventually it has to come to that since even electricity usage (servers....etc) need to find alternatives and there are successful example where the whole electricity source is from the sun. So for approaching this through mining is a great idea given it has higher returns.