"Those concerns of a national character-such as air and water pollution that do not respect state boundaries, or the national transportation system, or efforts to safeguard your civil liberties-must, of course, be handled on the national level."

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War contributes greatly to global warming, which shouldn't surprise us. All those bombs going off, all those rockets, all those planes and helicopters. All that fuel of various kinds being used. It pollutes the air and water of this very fragile and interconnected planet.

— Alice Walker