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Space debris 'needs addressing'

2 October 2012 Last updated at 18:37 BST

UK engineers are developing a system to harpoon rogue or redundant satellites and pull them out of the sky.

It is one of a number of responses to the ever growing problem of orbital junk, old pieces of hardware that continue to circle the Earth and which now pose a collision threat to operational spacecraft.

Professor Richard Crowther from the UK Space Agency says there is a short window of opportunity to get on top of the problem.