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The Rockefeller family, which made its vast fortune from oil, announces it will sell its investments in fossil fuels and reinvest in clean energy. Stephen Heintz, president of the Rockefeller Brothers Fund tells us why. Heads of state and government descend on New York to take part in the United Nations Climate summit later on Tuesday. We speak to a man who has previously advised UN secretary general Ban Ki Moon on matters relating to climate change. Now Jeremy Oppenheim is Programme Director for The Global Commission on the Economy and Climate. Plus: what's the world's most popular single piece of entertainment? Gordon Cox from Variety explains what and why.