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.

What if California didn't close down during the pandemic?

Researchers at the California Academy of Sciences, along with a collaborator at Denison University, have developed an innovative new model to assess how the California economy might have fared without economic closures to ...

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