The Koch Brothers made their fortune in the fossil fuel industry, and so their political arm, Americans for Prosperity, dutifully advocates against all manner of proposals and measures that support development of renewable energy sources. Last week, AFP was at it again, releasing a letter railing against the now-expired wind production tax credit.

In the letter, AFP cites many of its usual arguments against the wind tax credits, calling the incentives “government favoritism in the energy marketplace.” But this time, AFP is joined in their complaint by 116 other groups that also signed onto the letter. AFP trumpets that the groups supporting the letter are “diverse in size and scope,” and while that may be true, several of the organizations listed also receive substantial backing from the Koch brothers.

Last week’s AFP letter is just another self-serving argument against green energy by the fossil fuel-loving Koch brothers, this time with the added benefit of slightly disingenuous “grassroots” support.