Ocean acidification in a test tube
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COP21: What does ocean acidification look like?

Marine scientists are concerned that changes in the chemistry of the world's seas will have severe consequences for marine wildlife and ecosystems.

Jason Hall-Spencer, professor of Marine Biology at Plymouth University, shows BBC environment correspondent Matt McGrath the potential impact through two experiments at London's Aquarium.

Produced by Marcus Thompson

  • 30 Nov 2015
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