What’s in a number? The goals of the 2021 United Nations’ climate summit in Glasgow, Scotland, called for nations to keep a warming limit of 1.5 degrees Celsius “within reach.” But when it ...

It is nearly impossible to read about climate change without encountering a boatload of numbers. Unfortunately, those numbers are often tossed around loosely, sometimes irresponsibly. Sorting ...

It remains to be seen exactly how countries will incorporate all these fresh commitments and big numbers into their national climate pledges—something else to watch out for in the 2022 updates.