It has been calculated that just taking away a few key spent rocket stages or broken satellites would substantially reduce the potential for collision and cap the growth in space debris over coming decades.

BBC: Space debris: Time to clean up the sky

Audi unveiled its new futuristic LED headlights, which the company claims will increase visibility and reduce the chances of a collision and Lexus unveiled a new high-tech autonomous vehicle that could pave the way towards self-driving cars.

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