BOSTON - Global warming could have a profound impact on our ability to get a good night's sleep.
It's hard to sleep when it's hot and muggy and, as temperatures rise around the globe, billions of people are going to have more difficulty getting some shut eye.
A new study looked at more than 47,000 people from 68 countries who wore sleep-tracking wristbands from 2015 to 2017.
Researchers found that on nights that were hotter than average, people slept less. They project that by the end of the century, we could experience at least two weeks of short sleep each year due to high temperatures.
Those who will feel the greatest impact will be the elderly, who tend to be more sensitive to temperature variations, and people with lower incomes.
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