I think climate change dwarves any other single issue in the world today. It's undeniable that it is happening, but even if it were all some big hoax, there is no reason not to try and help preserve the one home we have.
I'm trying to do the best I can, but it does seem futile. I try to recycle religiously, even though I know our useless local authorities will end up shipping it off to Thailand. I bought a desiel car because our moronic government said it was the most environmentally friendly option at the time (looking at full ev at the moment). I get my 7 year old son steam vouchers for his birthday... Unfortunately the Mrs still insists on buying him a load of plastic tat he never touches.
Far from perfect, but it's something. It does play on my mind with everything I buy and choose to do.
The government and large corporations should also be doing so much more too. Unfortunately they're of the opinion that it's someone else's problem to sort. Beggars belief.