According to a Nielsen global survey of online consumers, the US has one of the steepest declines in concern. Fewer than half Americans worry about climate change and only 58% of Brits, less than in China and Russia. But 90 per cent of Latin Americans are concerned, up from 85 per cent in 2009, and 93 per cent of Thais. 69% in 51 nations are concerned: essentially unchanged over the last four years. The 48% of concerned Americans is down from compared to 51% in 2009 and 62% in 2007. In China concern fell from 77% in 2009 to 64% in 2011, nearer to 2007’s figure of 60%.