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Last week, President Obama demanded that Congress take action on climate change, or else he would.

But, after years of political gridlock on the climate issue, coupled with rising seas and worsening droughts, one thing is clear: the nation simply cannot afford to wait any longer to take action. Though Congress may eventually pull together and pass a climate bill, the president must not wait on that uncertain prospect. He must act now.

Note from Lisa Evans: The National Association for the Advancement of Colored People (NAACP) last week released the "Coal Blooded Action Toolkit," which is a companion to its report, Coal Blooded: Putting Profits Before People, published jointly by the NAACP and Little Village Environmental Justice Organization and the Indigenous Environmental Network last November.

The mention of soot conjures images of black clouds pouring out of unfiltered cars, or of cities lost in dark fog. At times in our history, soot pollution has helped stain entire ecosystems black, famously causing moths in Britain to change color from white to black to better hide in their environment. These images are well-deserved: soot is dangerous to both humans and the environment.

Tiny plastics clog the world’s oceans