Mike Berners-Lee thinks, writes, researches and consults on sustainability and responses to the challenges of the twenty-first century. His previous books include How Bad Are Bananas?: The Carbon Footprint of Everything (2010) and The Burning Question: We Can’t Burn Half the World’s Oil, Coal, and Gas. So How Do We Quit? (2013, co-written with Duncan Clark).  Berners-Lee is a professor in the Institute for Social Futures at Lancaster University, where he develops practical tools for thinking about the future, and researches the global food system and carbon metrics.