In 2050 increase in greenhouse gas emissions will be 50 percent.This would rise the global average temperature between 3° C and 6° C.Because of air pollution 3.6 million people per year will die in India and China.Population growth has more direct effects upon the environment.Water demand is projected to grow by 55 percent in 2050.40 percent of the global population will live in "water-stressed" areas.The number of people with access to an "improved" water source should increase. Deforestation rates will continue to increase and the forests will shrink 13 percent.
John Bongaarts of the non-profit Population Council said,The United Nations has predicted the global population will reach seven billion this year, and climb to nine billion by 2050.To feed all those mouths, "we will need to produce as much food in the next 40 years as we have in the last 8,000," said Jason Clay of the World Wildlife Fund at the annual meeting of the American Association for the Advancement of Science (AAAS).
"By 2050 we will not have a planet left that is recognizable" if current trends continue, Clay said.
Incomes are also rise over the next 40 years and add more strain to global food supplies.People tend to move up the food chain as their incomes rise, consuming more meat than they might have when they made less money, the experts said.Population experts, meanwhile, called for more funding for family planning programs to help control the growth in the number of humans, especially in developing nations.