Well, it’s pretty OT, so I won’t press it, but I can’t resist replying.
I think it’s perfectly OK to advocate recycling, renewable energy etc. I know a few jerks who are extreme and in your face about it, but most people just quietly say why they think it’s good and get on with doing their part to make it happen.
Now I happen to think that overpopulation is the greatest single contributor to environmental degradation, and to a few other problems also. So I say that, and come up with a very simple target number, just like a person advocating renewable energy might say that they think a 50% goal sounds good.
And in response, others say that is hateful? Or extreme? Hmm… Look in the mirror.