Well, for a start I don't believe scientists. They only work on the data they have and that inevitably changes as they discover new things. It used to be common for doctors to recommend smoking to counteract overeating and nail-biting (honestly, I was told that) and smoke was supposed to 'clear the tubes'.
I do as much as I can (and more than a lot, I daresay) in recycling and saving because I grew up in the 50s when you wasted nothing. Our area also came top in UK for recycling last year.
As others have said, I see little point in doing much more whilst China etc. increase their pollution by more than we can ever save.
I heard the other day that the much vaunted 'windmills' actually raise the temperature above them by something approaching 2 degrees, so much for eco-friendly! I go for wave-power myself.
We already eat less meat, grow our own veg., buy eggs from local hens, support local food producers. No, I'm not doing any more until the rest of the world does. What we could do as a country is to stop child benefit.