A decision by President Trump to remove the United States from the 2015 Paris climate agreement would be a shameful act of self-harm. The decision would hurt everyone in the world, and poor people most, by making it harder to avoid a future of bigger storms and fires, disappearing coastlines, and tougher crop-growing conditions. But the most severe and immediate harm would be to the United States, which by banishing itself from the community of nations trying to prevent dangerous climate change would irrevocably damage its global standing.
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