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Here's what we know.The Amazon forest, which produces about 20% of earth's oxygen, is often referred to as "the planet's lungs." An inferno in the Amazon, two-thirds of which is in Brazil, threatens the rainforest…

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Chip Somodevilla/Getty Images Sen. Chris Murphy isn’t giving up on the long-shot effort to pass expanded gun background checks. And, he says, neither is President Donald Trump. Fresh off Thursday evening conversations with White House…