The UK space launch failed but it succeeded in releasing hazardous pollutants to multiple layers of the atmosphere.

Soot from research bases and sightseeing cruises is melting millions of tonnes of Antarctic snow every summer

Soot from research bases and sightseeing cruises is melting millions of tonnes of Antarctic snow every summer

Air-ventilation upgrades have been badly needed in U.S. classroooms since long before the pandemic. Low-tech filtration systems that cost about the same as a textbook per student can make a big difference.

Soot from aeroplane exhausts can linger in the atmosphere, seeding ice clouds which trap heat.

Replacing wood stoves is essential but won't solve the indoor air pollution epidemic on its own.

Wildfires in British Columbia in 2017 caused the formation of a cloud so big that scientists say it will help them model the effects of a nuclear war.