Science threads are interesting to me too. Just maybe not so interesting for those who are not interested.
IMO climate change is a real concern, but there's no point to "just do something" without considering whether it'll actually help or not.
Motivating people cost you their "consideration" and "inconvenience" and they are also "limited resource" for most people (depleted people will become less likely to join future "save our earth" events). It's wrong to "waste" them for no good reason.
Take this "Earth Hour" campaign for example. If you think about how power plants' fuel consumption works, you'll know it has no direct impact on lowering CO2 level. However it's always good to remind people that we should save electricity, and I'll comment that it's an effective activity in that sense.