For years, billionaires David and Charles Koch have given millions to Tea Party candidates and anyone else who fights efforts to promote clean energy and stop climate change.
Last weekend, this dangerous duo met behind closed doors with other big-money donors and political strategists to plot how to end the EPA's authority to protect our clean air and water. Sierra Club Executive Director Michael Brune blogged about why the Koch brothers threaten America's future -- and how we can stop them
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