Related topics: air pollution · air quality · pollution

Brazil flooding death toll surpasses 100

The death toll from devastating floods that have ravaged southern Brazil for days surpassed 100 on Wednesday, authorities said, as the search for dozens of missing people was interrupted by fresh storms.

Demystifying the complex nature of Arctic clouds

With dancing ribbons of light visible in the sky, a team of researchers flew on a series of scenic and sometimes stormy flights into the cold unknown, trying to learn more about why one of the most frigid places on Earth ...

How to clean up New Delhi's smoggy air

An international study led by atmospheric researchers at PSI shows for the first time what portions of particulates in the air over northern India are especially harmful to health.

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