It does no good to shoot down every change as "not good enough." I think the people who do this, almost as a knee jerk response, either do not actually believe that global climate change is something to be concerned over, or else instead achieve their self-esteem through tearing others down.

The environmentalists eat their own so often and so badly that they can't be taken seriously. You need to give people something to latch on to that appeals to them, to start something. Scolding them for believing something is a true solution when it is about a 1% solution is helping nobody.

1000 people each doing a different 1% solution is better than 10 people each doing a theoretical 100% solution. Over time, the former will run in to some good practices. The latter are just turn-offs.