Nasa has released a powerful illustration of Earth's long-term warming trend between 1880 and 2015Nasa has released a powerful animation mapping global warming trendsbetween 1880 and 2015.It shows the changing temperatures over the last 100 or so years using a rolling five-year average.The blue colours represent temperatures cooler than average, while hues of orange signify temperatures warmer than average. Read More at www.telegraph.co.uk