Conversation

Since 1970, humans have pumped so much groundwater, we’ve altered the Earth’s tilt. “It is, in a way, mind boggling,” the researchers who discovered the tilt, stated. Humans are causing so much polar ice to melt that we are changing time. We are slowing the Earth’s rotation and may have to subtract a leap second very soon.

https://www.science.org/content/article/humanity-s-groundwater-pumping-has-altered-earth-s-tilt

https://www.scientificamerican.com/article/global-warming-is-slowing-the-earths-rotation/