Their opinion is correct fact according to me.
It's also called Natural Selection. Or said another way, "what can't be sustained won't be sustained."
I would strongly disagree. As I said before, nothing is sustainable in the long run. The sun will die eventually, and the life on Earth will die too (even without our "help", as it were), so we shouldn't take an opportunity to use solar energy or just live?

And I know what you would say in response...
