[yongjik]

> A. The climate is getting hotter.

This is, of course, easier to prove. In fact, mountains of evidences support this claim. It can be considered "proven" in the same way the heliocentric theory or the existence of Pangea is considered proven.

The problem is that people don't understand what "average" means, and keep saying things like "If the earth is warming how come my town got record snowfall last winter? This disproves global warming!"

In other words, the renaming of "Global Warming" to "Climate Change" has got nothing to do with the abundance (or lack) of evidences. It's a purely pedagogical issue.