http://samuel-warde.com/2015/07/exxon-knew-human-caused-climate-change-was-real-in-1981/
"In a replay of the tobacco industry’s decades long stance that cigarettes posed no health risks, Exxon has been exposed for knowing since at least 1981 that the rapid climate change we are experiencing is caused by human activity. Despite having that knowledge, ExxonMobil, the largest oil company in the world, spent millions of dollars over the next 27 years promoting climate denial and misinformation."
