Is James Hansen a climate prophet?
Everything changed after his 1988 congressional testimony.
For decades, the average temperature in the United States and the Arctic Sea-Ice volume remained relatively stable, despite the increase of atmospheric CO2 from ~300 ppm in 1920 to ~350 ppm in 1988. And then something remarkable happened. Following Dr. James Hansen's groundbreaking testimony before Congress, the US experienced a sudden and dramatic temp…
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