7 billion world population has exceeded the brink of the fall of the bottom line number of the Earth

United Nations agencies estimated that by 2100, world population will reach 10 billion, slightly higher than expected if the birth rate, the world's population will likely exceed 150 million. Earth is home, as the population increases, over-exploitation and land use, environmental scientists to set the earth in defense of the nine security, biodiversity loss, nitrogen and phosphorus pollution and water depletion, etc. The bottom line is on the verge of several Earth. ..7 billion world population has exceeded the brink of the fall of the bottom line number of the Earth