How large turkey vultures remain aloft in thin air

Mountain hikes are invigorating. Crisp air and clear views can refresh the soul, but thin air presents an additional challenge for high-altitude birds. "All else being equal, bird wings produce less lift in low density air," ...

Locating poor air quality in cities

People in big cities breathe bad air. Bad air that consists of particulate matter and other pollutants, which pose health risks to urban citizens. Researchers led by Dr. Martin Ramacher of the Hereon Institute of Coastal ...

Air pollution: The silent killer called PM2.5

Millions of people die prematurely every year from diseases and cancer caused by air pollution. The first line of defense against this carnage is ambient air quality standards. Yet, according to researchers from McGill University, ...

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