The carbon footprint of the Internet: Around 300 million tonnes of CO2 per year, equivalent to every person in the UK flying to America and back twice over.
互联网的碳足迹：每年产生将近三亿吨二氧化碳，相当于所有英国人坐飞机来回美国两次产生的碳足迹。
2
Their use around the world generates carbon dioxide emissions equivalent to those produced by around 38 million cars per year.
全世界范围内煤油灯的使用所产生的二氧化碳排放量相当于每年大约3800万辆汽车的排放量。
3
About 300, 000 acres (121, 400 hectares) of mirrors would be required to collect enough sunshine to make the equivalent of 1 million barrels of oil per day, she says.