A Climate Change Primer at ARS Technica

Ars Technica does an incredible job providing a climate change primer
trying to get back to some basics.  After the sensationalism around the
leaked CRU emails the last couple of weeks, it’s nice to have a piece
that explains some basic facts of what we know and how we know it, in a
very digestible form.

Update: I had the wrong link in my copy buffer, fixed now.