There has been a dramatic global decline in the number of children being born, researchers have revealed. The study, published in the Lancet, followed global trends from 1950 to 2017 and found fertility rates are now not high enough to maintain current population levels in 91 countries, including the UK. But while the overall trend is going down, there’s a huge variation between nations, with populations going up in 104 countries. A demographic catastrophe or welcome news for environmentalists? We speak to Robin Maynard, the director of Population Matters, which campaigns against population increase.