The world's soaring population is expected to hit 7 billion by 2012, further straining thinly stretched natural resources, AP reports. The current population is 6.7 billion, and growing at 1.2% a year, spurred by increasing medical and nutritional advances in developing countries. But as more women in developing nations join the work force, the growth rate is expected to slow—eventually to .5% by 2050. (More human population stories.)