Tristram Stuart is a writer and campaigner against food waste. In 2011 he was awarded the Sophie Prize for his contribution to international environmental causes. His prize-winning book Waste: Uncovering the Global Food Scandal (2009) reveals that Western countries waste up to half of their food supplies, and his theory of ‘freeganism’ (eating food discarded by others, and recycling) purports that it could feed the world’s one billion starving four times over. He set up Feeding the 5000 (www.feeding5k.org), the flagship event of a global food waste campaign where 5000 members of the public are given a free lunch using only ingredients that otherwise would have been wasted. Tristram continues to work with a range of NGOs, governments, and private enterprises internationally to tackle the global food waste scandal, as well as vocalising its moral importance for societies.