A scientist at the Massachusetts Institute of Technology says people will not be able to live in parts of South Asia by the year 2100 if little is done to stop climate change. Elfatih Eltahir studies the world’s climate. He was among the writers of a recently published report in the journal Science Advances. He said, the heat wave intensity will reach magnitudes that have not been observed before. Eltahir’s study takes humidity into consideration, along with heat. The researchers believe the combination of the heat and humidity will make areas in South Asia difficult to live in. The researchers used a measurement called “wet bulb temperature.” It is based on air temperature and the amount of water in the air. A very high wet bulb temperature prevents humans from being able to cool themselves by sweating.