As pollution in Delhi peaks in winter, people are advised to avoid morning walks. But why is morning air so toxic despite low ...

Winter is setting in across the Northern Hemisphere, and with it, cold and cloudy winter days. Clouds play a vital role in ...

For nearly two months, thick layers of toxic smog have enveloped New Delhi, where residents say all they want is their right ...

It’s easy to tell when it’s smog season in New Delhi; the air gets darker, heavier and starts scratching the throats and ...

NEW DELHI — A thick layer of smog enveloped India's capital Monday, filling the air with an acrid smell as pollution levels surged and worsening a public health crisis that has prompted its residents ...

Children exposed to traffic-related air pollution show seasonal changes in their nasal bacteria, with winter pollution driving a shift toward less diverse, and potentially more harmful, microbial ...

"The late morning, specifically between 11:30 am and 12 pm, is typically safer due to rising temperatures and sunlight aiding in pollutant dispersion. Another good time is late afternoon, from 3:30 to ...

ST. PAUL — Wildfires in Canada are continuing to pour smoke into Minnesota, triggering another red alert, a week after the state was said to have one of the worst air qualities in the world. The red ...