The issue is that you said “most environmentalists” don’t make sacrifices. Now you’re asking me to show you that they do because I’m asking you to support your claim with evidence. Most environmentalists that I know recycle, bike to work, air dry their laundry, compost, and do all sorts of other lifestyle changes to addresss the problems. So I’m asking for empirical support that leads you to use a premise like “most environmentalists” don’t make sacrifices. It’s not true, as far as I know. You made the claim, so it’s also not on me to go disprove it. It’s on you to show support for it.