This week, 40 billion tons of ice will melt in Greenland as the European heat wave moves north — enough to measurably raise global sea levels.
This single heat wave will create a permanent change in our oceans that will linger for millennia.
We are in a climate emergency. https://t.co/ypkH6093aU
— Eric Holthaus (@EricHolthaus) July 29, 2019