If you’ve never stopped to think about how climate change will affect your sleep, the connection between a warmer planet and poor sleep quality is fairly significant, especially among vulnerable populations.

“Sleep scientists know that a person’s internal (or ‘core’) temperature is directly related to their ability to sleep through the night — and typically, the warmer you are, the worse your sleep,” Dr. Sanam Hafeez, a New York City-based neuropsychologistand faculty member at Columbia University, tells Bustle.

According to NASA’s Global Climate Change initiative, the temperature on Earthclimbed about 2 degrees Fahrenheit during the 20th century. No biggie, right — what’s a few measly degrees? As it turns out, two degrees is a lot. In fact, a two-degree temperature increase is extreme in the history of the planet, NASA noted, and one of the results is an increase in sleepless nights.

Get the full story at bustle.com.