The UK government's chief scientific adviser, Sir David King, is to call for a rethink on GM crops in his farewell speech before leaving his post.He will be making his comments to a group of senior scientists at the Foundation for Science and Technology.
He will also look at the role of nuclear power and the need for robust and urgent action on climate change.
Sir David steps down after seven years, having often been in the maelstrom of where science meets politics.
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