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linkhttp://SFChronicle.com calendar_today10-03-2010 00:44:07

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6 months ago

OPINION: "By 2070, more than 3 billion people could find themselves living outside of humanity's 'climate niche' — the temperature range that has sustained human activities for millennia," writes Gaia Vince, a global environmental strategist and author. trib.al/hLFDy6F