Afghanistan, April 4 -- A new study led by researchers at The Nature Conservancy warns that one-third of the world's population now lives in places where extreme heat severely limits daily activity, making even simple summer tasks harder and less safe. The study says rising temperatures are increasingly affecting not only work, but also basic outdoor movement and routine life.
Researchers said the impact is especially severe for older people, whose bodies are less able to cool through sweating. According to the study, adults aged 65 and older now face about 900 hours a year when heat sharply restricts safe outdoor activity, compared with about 600 hours in 1950.
The report found the worst effects in South Asia, Southwest Asia and parts of...