Greener by miles 03/06/2007 Conscientious consumers are being urged to buy locally sourced food in the battle against climate change. But, as Richard Gray discovers, produce from the other side of the world can actually have a smaller carbon footprint Take a look in the average supermarket trolley and the food there will probably have travelled farther than most people clock up in a decade. A selection of just 26 items can have covered a total of 150,000 miles before reaching the British kitchen. With beef from Brazil, beans from Kenya, apples from New Zealand, chicken from Thailand and strawberries...