China's Slowing Economy

China forecasts an official economic growth rate of 7% this year; what is slowing it down? The BBC's chief business correspondent, Linda Yueh, reports from Shanghai. Also, Jeremy Leggett, chairman of the research group Carbon Tracker Initiative, and founder of the British solar energy company Solar Century, makes the financial case for energy companies to start turning their backs on fossil fuels. And the BBC's Theo Leggett reports on new technology aimed at making solar energy more efficient.