Exxon scientists warned about climate change in 1977

Despite its efforts for nearly two decades to raise doubts about the science of climate change, newly discovered company documents show that as early as 1977, Exxon research scientists warned company executives that carbon dioxide was increasing in the atmosphere and that the burning of fossil fuels was to blame.

The internal records are detailed in a new investigation published Wednesday by InsideClimate News, a Pulitzer Prize-winning news organization covering energy and the environment. Here is a direct video link.