Greenpeace has done an extensive report on the move by oil industry giants to fund a campaign challenging real science. Maddow digs in as well to explain who is spending $50M to sell the argument climate change is not caused by fossil fuels or more accurately digging up sequestered carbon and spewing it into the atmosphere.

Billionaire oilman David Koch likes to joke that Koch Industries is “the biggest company you’ve never heard of.” But the nearly $50 million that David Koch and his brother Charles have quietly funneled to climate-denial front groups that are working to delay policies and regulations aimed at stopping global warming is no joking matter.