What website do you believe and why?

I believe global warming facts #1 (http://news.nationalgeographic.com/news/2004/12/1206_041206_global_warming.html) because global warming is not fake. Scientists can show statistics that it's real like that the temperature has climbed 1.4ºF since 1880. The other website, global warming facts #2 (http://kutwrite.hubpages.com/hub/Global-Warming-Fake-01), doesn't seem logic. They don't share as many examples as the other website. Also, global warming has been talked about for a long time. Why would they keep the lie of global warming going this long? What does it prove? This is why I believe global warming facts #1 over global warming facts #2.