Telegraph: Prince Charles, who has long been an outspoken campaigner on climate change, has made clear his frustration that more has not been done to tackle global warming, despite clear warnings from UN scientists of the potentially catastrophic risks it poses. In a pre-recorded video address to political and business leaders in New York, as they meet for major international climate change talks, he describes climate change as the greatest challenge facing humanity. Speaking as Patron of the Prince of Wales's...