Opponents of the theory of anthropogenic climate change are hard at work via Internet forums making a last stand against the present societal momentum to address our impact on global climate and, specifically, to reduce the carbon footprint of our energy systems. Midland, MI-based multimedia producer, cartoonist, and alternative energy enthusiast Peter Sinclair is returning fire, nugget-for-nugget, with his new YouTube-distributed video series, Climate Denial Crock of the Week.

Each episode of Crock answers one of the climate denial “hobby-horse arguments” with five minutes of science-based, semi-professionally produced video. The Vikings star in this week’s episode, Medieval Warming?, which explodes the notion that Earth was warmer in the Middle Ages:

Previous episodes tackle, among others, the role of solar cycles, sea ice volume versus area, and the meaning of cold snaps.

Sinclair’s message to the deniers is: “Please. Please debate me. I’ll rent the room… Come on down.” Sinclair received training to do just that via Al Gore’s Climate Project, but he could have far greater impact via YouTube. For a sense of his motivation from the horse’s mouth see this video interview of Sinclair at Regeneration, a 3-day gathering of university students in Grand Rapids last month organized by the Michigan Student Sustainability Coalition.

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This post was created for Energywise, IEEE Spectrum’s blog on green power, cars and climate