Earth: Crossing Into Danger

From the always worrisome Earthweek: January 23

An international team of 18 researchers warns that a potent combination of human activities has pushed four of the planet’s nine ecological boundaries into “danger zones,” threatening life on Earth.

The four boundaries that have been crossed are climate change, loss of biodiversity, improvident land use and an altered nitrogen cycle due in part to fertilizer use.

“For the first time in human history, we need to relate to the risk of destabilizing the entire planet,” study author Johan Rockström of Stockholm University told the Thomson Reuters Foundation.

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