An Answer To The Warming Deniers

If you have a brother-in-law who gets under your skin by either denying global warming or claiming that it's not caused by human activity, this article is just what you need.  It is long, but it is well written and settles the controversy.  It also explains why the deniers say what they do.

http://www.skeptic.com/eskeptic/12-02-08/#feature