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Why it’s important that we know we’re at 400 ppm of CO2

Eric Biber, professor of law | May 20, 2013

A major (and unfortunate) milestone has been crossed this past week.  Measurements of atmospheric levels of carbon dioxide passed 400 parts per million, the highest in millions of years.  Others have commented  on how worrying this milestone is for the planet. But what I want to focus on here is how important it is that … Continue reading »