All so called nature lovers should do what Jesus did. That is, go out into the wilderness for 40 days with nothing more than you can carry on your person. If they can make the 40 days and survive they will have a whole different attitude when they return.
There was one guy that did try that. I remembered reading an article about it. He starved to death after about 30 days or so. This was during the summer when he could have eaten berries.