FOOTSTEPS DISAPPEAR

Mike Berners-Lee lays out an eight-step carbon detox.

1 Adjust your diet. Cut out meat and dairy, especially beef and lamb. And make sure you eat everything that you buy: food waste accounts for eight percent of greenhouse gas emissions, according to the UN Food and Agriculture Organization. Avoid air-freighted food, such as vegetables like berries, mange-tout or asparagus, when they are out of season.

Transport’s biggest source of emissions are planes, then cars. For a family of four, a return trip from the UK to Australia emits 12 times more carbon than running a car