The world’s population, now 7.3 billion, is expected to reach the 11 billion mark by 2100, according to revised population projections released yesterday by the United Nations (UN) Population Division. Earth as seen on July 6, 2015 from a distance of one million miles by NASA’s EPIC camera on the DSCOVR satellite. Image credit: NOAA / NASA / U.S. Air Force. “According to models of demographic change derived from historical experience, it is...
