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Would a nuclear war or an asteroid hitting Earth offset global warming? Ask Paste BN

Name: Would a nuclear war or an asteroid hitting Earth offset global warming? Ask Paste BN
Uploaded: 2013-11-28T03:25:09Z
Duration: 2 min 9 s
Description: Science reporter Elizabeth Weise answers this reader question about nuclear war, asteroids and global warming. Send your question using #askusatoday onTwitter or by e-mailing askusatoday@usatoday.com.

Science reporter Elizabeth Weise answers this reader question about nuclear war, asteroids and global warming. Send your question using #askusatoday onTwitter or by e-mailing askusatoday@usatoday.com.