I'M STILL SCEPTICAL: "Exxon knew of climate change in 1981, email says – but it funded deniers for 27 more years "| Environment | The Guardian

This is by "the guardian" , a very liberal UK news source. We will have to wait & see if this is skewed by them in some way.
http://www.theguardian.com/environment/2015/jul/08/exxon-climate-change-1981-climate-denier-funding