1,000 Monterey pine tree seedlings to be planted this weekend: How you can help

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We are on the precipice of climate system tipping points beyond which there is no redemption. JAMES HANSEN, director, NASA Goddard Institute for Space Studies, New York, December 2005

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We are on the precipice of climate system tipping points beyond which there is no redemption. JAMES HANSEN, director, NASA Goddard Institute for Space Studies, New York, December 2005