Fire and Ice in the 21st century
Less the 12,000 years ago the last Ice Age drew to a close, or more accurately, a glacial period ended. A new glacial period is likely to begin in one to two thousand years’ time, so humanity is enjoying a nice, warm interglacial interlude. This has been great for the world population, enabling a massive increase in agriculture-based civilizations. In CE 1 the population has been estimated at two hundred million, and now it is well over seven billion – a 350-fold growth.