Time to take away their ATVs and go back to horse, dog team, and walking everywhere they go. Also, no more fossil fuel powered travel.  Good luck getting home. Flying is polluting and contributing to greenhouse gases. We must save the planet. Time to get the kayaks, row boats, and sail boats back out. No more powered vessels on the seas, lakes and rivers.

Are they willing to walk the walk or are they just living with their heads in the clouds?  Do they want it to apply to everyone or just "the other people", not them?

It must be nice to live in a bubble that isolates themselves from reality.  By all means, create better fuel sources and do as much as you can to decrease pollution. Just do it sensibly.