James Hansen,

"Defusing the Global Warming Time Bomb,"

Scientific American, March 2004, pp. 68-77.

NASA Goddard Space Center, scientist, atmospheric science.

"Global warming is real, and the consequences are potentially disastrous. Nevertheless, practical actions, which would also yield a cleaner, healthier atmosphere, could slow, and eventually stop, the process....through study of the earth's climate, which reveals that small forces, maintained long enough, can cause climate change. And, consistent with the historical evidence, the earth has begun to warm in recent decades at a rate predicted by climate models that take account of the atmospheric accumulation of human made greenhouse gases."

Related matters:

Frequently asked questions: FAQ.

Rising temperatures

Historical evidence

Bibliography of other sources, annotated

The relation of greenhouse gases to externalities

Subject index for global warming pages.

Recent publication, 2006.

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