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Longer-term thinking 'needed' on air pollution

David Shukman looks at what could be done on air pollution beyond the annual warnings.

9 April 2015

David Shukman

Science editor

David Shukman

Hubble issues 25th birthday image

The Hubble Space Telescope celebrates its silver anniversary with a picture featuring a spectacular vista of young stars blazing through a dense cloud of gas and dust.

23 April 2015

Jonathan Amos

Science correspondent

Jonathan Amos