President Trump’s environmental onslaught will have immediate, dangerous effects. He has vowed to reopen coal mines and moved to keep the dirtiest power plants open for many years into the future. Dirty air, the kind you get around coal-fired power plants, kills people.
It’s much the same as his policies on health care or refugees: Real people (the poorest and most vulnerable people) will be hurt in real time. That’s why the resistance has been so fierce.
But there’s an extra dimension to the environmental damage. What Mr. Trump is trying to do to the planet’s climate will play out over geologic

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