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.
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.
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.