Would you mind showing me where I said we should go ahead and trash the planet? Thats right - I didn't. The problem with people bringing politics and nonsense into a discussion is they make up crap to push their agenda.
The simple fact is that Earth *will* be fine. The stuff she's been through in her history has been phenomenal and amazing. For human's, it boils down to habitability for humans (which is where your sole focus appears to be). *MY* point is there is a 100% chance that sooner or later Earth will either slip back into the ice phase of the current ice age we're in, or it will fully leave the ice age and get very hot here, much much hotter than the people who focus on anthropological climate change have even imagined.
In the former - large swaths of land will become covered in ice and become uninhabitable. In the later, with a 75F average global temp - we will see extreme high temps in excess of 120F, well above the capability of humans to cope, again making much of Earth uninhabitable. For 98% of Earth's history - she is either in full ice age or full heat mode. She cares not one iota if humans can live here or not.
Human's only chance at avoiding the above would be to figure out a way to control climate on a massive planet wide basis to maintain our current Goldilocks zone that we've been in for the past 12,000 years. A zone that, again, is maybe about 2% of the total time of Earth's history. I haven't done the math on that percent so it might even be much smaller, like less than .05%. The point being - the current climate humans are enjoying is not the norm and is not going to last much longer without massive scientific break throughs in controlling climate (which I doubt we'll achieve).
Should we be cleaner in our energy use? Yes. Not because of climate change but simply because it gives us cleaner air and water and healthier lives. But if we think its going to stop the climate from changing to a more normal state for Earth, we're delusional.