阻止气候变暖,是否为时已晚?

摘要

@@ Scientists Talk of Possible "Tipping Point1"rnIt was the summer of 1988, and strange things were happening: Repeated heat waves hit the eastern seaboard2 of the United States, while the Midwest was mired in massive drought3. In some places, the waters of the Mississippi were so low that barges were stranded4.