Joe Nocera Is Still Wrong and “Very Unfair” About the Keystone XL Tar Sands Pipeline. McKibben, Hansen and I Explain Why.

Joe Nocera Is Still Wrong and “Very Unfair” About the Keystone XL Tar Sands Pipeline. McKibben, Hansen and I Explain Why.: pWe must leave the overwhelming majority of unconventional fossil fuels in the ground to avoid catastrophic warming, but Nocera wants to open every spigot CO2 emissions by fossil fuels [1 ppm CO2 ~ 2.12 GtC, where ppm is parts per million of CO2 in air and GtC is gigatons of carbon] via Hansen. Significantly exceeding [...]/p