One more deg C of warming will make outdoor labour more dangerous for 800 million people, says One Earth

Humidity and heat are a lethal combination because the high moisture in the air makes it hard for sweat to evaporate from the skin. - PHOTO: ST FILE

SINGAPORE (The Straits Times/ANN): It will take only 1 deg C of further global warming for intense, humid heat to endanger the health and imperil the livelihoods of hundreds of millions of outdoor workers in the tropics, a United States-led study has found.

The planet has already become hotter by about 1.1 deg C on average since pre-industrial times.