The Metronome in Union Square now displays the time left before we burn all the carbon that will push the planet over the key 1.5 degrees Celsius of warming.

The clock takes into account the threat of nuclear war, climate change, and global health, per The Washington Post. The original clock focused specifically on the potential for nuclear war ...

But a study published in Nature last year suggested that in fact, climate change might be affecting timekeeping in general.