This is the most depressing video I have seen in a long time. The premise is devastating in its simplicity: a collection of clips of news programs and politicians (mostly Republicans) talking about climate change next to a pair of charts showing rising global temperatures and falling Arctic sea ice coverage.

I found it striking that before the 2008 election of Obama and (especially) the 2010 midterm election that resulted in a Republican majority in the House, Republican politicians spoke clearly and publicly that climate change was happening and that something needed to be done about it. And now? Republicans deny climate change is happening and Trump is on the verge of pulling the US out of the Paris Agreement.

Update: See also How G.O.P. Leaders Came to View Climate Change as Fake Science.

Those divisions did not happen by themselves. Republican lawmakers were moved along by a campaign carefully crafted by fossil fuel industry players, most notably Charles D. and David H. Koch, the Kansas-based billionaires who run a chain of refineries (which can process 600,000 barrels of crude oil per day) as well as a subsidiary that owns or operates 4,000 miles of pipelines that move crude oil. Government rules intended to slow climate change are “making people’s lives worse rather than better,” Charles Koch explained in a rare interview last year with Fortune, arguing that despite the costs, these efforts would make “very little difference in the future on what the temperature or the weather will be.”

History, I hope, will not be kind to the Koch brothers. The ruin they have brought upon America for their own personal gain will be felt for decades.