LONDON, Nov. 3 (UPI) -- British Environment Minister Joan Ruddock has warned citizens that by not eating leftover food, they are effectively causing climate change. Ruddock said that through food waste and excessive shopping, British citizens were paying a significant cost in both environmental and financial terms, The Independent reported Friday. "At this rate we will not have a place to live which is habitable if we don't address climate change globally and the U.K. has to make its contribution," she said of such social problems.