Watch the video of the 3rd Earth Debate, hosted by the Museum on 14 March 2012. The debate focused on how cities will play an increasing role in the welfare of both people and the environment in the future and what is needed to make them greener. What do you think? Continue the debate online. www.nhm.ac.uk/natureplus/message/17349 The next Earth Debates will continue to explore issues that will be tackled at the Rio+20 Earth Summit. For more information about previous and the next debate - www.nhm.ac.uk/nature-online/biodiversity/earth-debates/