Today in America, Donald Trump decided to leave the most significant climate treaty of the 21st century.

At a ceremony in the White House Rose Garden, the president announced that the U.S. would begin the process of pulling out of the Paris Agreement, which requires signatories to strive to limit global temperature rise to 2 degrees Celsius.

Meanwhile, in Switzerland, two engineers unveiled this baby:

Photo by Julia Dunlop/Climeworks.

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