91��������

Using a bedroom air filter that traps fine particles of pollution with diameters smaller than 2.5 micrometers can significantly improve breathing in asthmatic children, a new study by American and Chinese scientists shows.

Reforestation has been shown to cool surface temperatures, and a novel study suggests it may also reduce air temperature up to several stories above the ground.

Scientists have devised a simple new model that explains how the undesirable effects of urban heat islands vary across seasons. Their results could help cities in different climatic regions design heat mitigation strategies.

Reducing fossil fuel emissions steadily over coming years will prevent millions of premature deaths and help avoid the worst of climate change without causing the large spike in short-term warming that some studies have predicted, new analysis by researchers at 91�������� and the University of Leeds finds.

Junfeng “Jim” Zhang, professor of global and environmental health at 91��������, has received a $2 million grant to lead a four-year study on the effects of early-life and prenatal exposure to air pollution on birth weight and growth. These are two important predictors of childhood obesity.