It is working; see http://www.google.com/publicdata?ds=wb-wdi...rt_in&tdim=true

Check it for most of the countries; you'll notice a very strong correlation between women's education levels/wealth and birth rates. The next great frontier is to reach Africa, and increase the penetration of women's education in other countries.

ok... overpopulation matters... before i suggest my idea. im not sure how advance our current science and technology is.

but assume if it is possible..

the solution here is.. i believe by the time human were around 65 years old or more.. most of them are incapable/weak physically. so just remove their body and keep our head in a jar.. (im not kidding..lol) to reduce any physical activities + less producing the carbon, less consumption as well..

i dont believe totally in birth control, theres no way you can stop idiot or smart people from producing because thats what make us today. communism, nazi ruling wont stop human from producing either..