Global CO 2 emissions from energy use remained roughly flat in 2016, according to a report from BP, a big oil firm. A year-on-year increase of 0.1% was well below the ten-year average growth rate of 1.6%. Improved energy efficiency and a slowing global economy were partly responsible. China also played a part: the country remains the world’s largest source of CO 2 but its emissions fell by 41m tonnes in 2016, partly thanks to weakness in some energy-intensive industries. In contrast, India’s emissions increased by 114m tonnes last year. The landscape has changed over the past quarter-century. In 2016 the Asia-Pacific region produced almost half of global emissions, up from 25% in 1990.