The ozone problem is back

30 years on ozone hole healing is proving painfully slow. New discoveries about chemicals not covered by the Montreal protocol are raising fears that full recovery could be postponed into the 22nd century — or possibly even prevented altogether.

Harvard Researchers Are Preparing to Geoengineer the Atmosphere

In a first-of-its-kind study, scientists will disperse aerosols into the stratosphere in initial tests of a controversial technique for blocking incoming solar radiation.

Geoengineering Could Be a Disaster for Astronomy

Geoengineering is one of those things that sounds like maybe a good idea on paper but could also go horribly wrong.

Europe's cutting-edge wind satellite should launch in 2017

Humanity is about to deepen its understanding of Earth's winds. The European Space Agency has secured a rocket launch deal for its wind-tracking Aeolus satellite, which is now expected to enter orbit before the end of 2017.