PARIS, France (AFP) - The world has lost nearly 100 million hectares of forests in two decades, marking a steady decline though at a slower pace than before, a UN agency reported Tuesday.The proportion of forest to total land area fell from 31.9 per cent in 2000 to 31.2 per cent in 2020, now some 4.1 billion hectares, according to the Food and Agriculture Organization (FAO).