71% of Earth is covered by water. In fact if viewed from a specific angle, the earth is just one giant ocean. My point is that if you live in a city, you can walk for hours and never reach the end, never reach any kind of wild nature. The city just seems to go on forever, and in this case, you think, oh my, we must be really polluting. We must calm down. But 71% of the planet is water, ie. not inhabited by humans. So in the big picture there is no way we are having any kind of significant effect on the climate.

ps heres the side of earth that is rarely shown