Welcome to Earth, how long have you been living here?

The Earth itself is huge, and that is the most blantantly asinine you could probably ever say. A lot of us want to do our part for a "better" world, and I'm just curious as to why every time that comes up the main solution to it is to just throw money at it. I mean just exactly that, not food, jobs, or clothing, just currency itself. Thow money at stuff and hope it does something.