This is an excellent article explaining the United Nations involvement. Just recently avast anti-virus has started blocking this webpage blog. I assure you it dose not contain any trojans or viruses.

A History of the Disastrous Global Warming Hoax

“It is the greatest deception in history and the extent of the damage has yet to be exposed and measured,” says Dr. Tim Ball in his new book, “The Deliberate Corruption of Climate Science”.
http://blog.heartland.org/2014/03/a-history-of-the-disastrous-global-warming-hoax/

Google has even blocked this article. It seems to be a clear attempt to scare and deter the public from viewing the truth.
http://www.globalclimatescam.com/category/ipcc/