These are taken from the UN's World Population Prospects, the 2010 Revision in their Frequently Asked Questions portion.http://esa.un.org/unpd/wpp/Other-Information/faq.htm
3 Billion: 20 October 1959
4 Billion: 27 June 1974
5 Billion: 21 January 1987
6 Billion: 5 December 1998
7 Billion: 31 October 2011
8 Billion: 15 June 2025
9 Billion: 18 February 2043
10 Billion: 18 June 2083
In densely populated areas of the of the world people need to MOVE, there is no reason to stay in a heavily populated area, but most people stay where their family and friends are or where they've grown up. People need to move to other areas and it is not easy in some places, nigh impossible in others such as an African or Middle Eastern countries or whatever economic situation you are in that prevents you from leaving to another area less densley populated. We will have to adapt, every soul deserves a chance here and just because cities are overpopulated doesn't mean the earth is overpopulated with humans.
As far as the food crisis here's a tidbit
Quote:(They word it better)
First, the WB and IMF, set up largely by the US following WWII, are notorious for refusing to advance loans to poor countries unless they agree to Structural Adjustment Programmes that require the loan recipients to devalue their currencies, cut taxes, privatise utilities and reduce or eliminate support programmes for farmers. The results are a weakened state, impoverished local farmers and increased economic domination by international corporations. Combined with this is constant pressure on poor countries to lower tariffs, preventing them from building up their industrial potential, often destituting their farmers who cannot compete with heavily subsidised produce from rich nations.
Second, rich country subsidies, in Canada, for example, allow the federal government to pay farmers $225 for each pig killed in an ongoing mass cull of breeding swine, as part of a plan to reduce hog production. Some of the slaughtered hogs may be given to local Food Banks, but most will be destroyed or made into pet food. None will go to, say, Haiti.
Third, biofuel programmes are now channelling massive quantities of cereal and other crops to produce fuel for the world's wealthy to run their second and third family cars while close to a billion starve(because of rising food costs in countries that live on $2 or less). Add in GMO products, which are now being forced on poor countries (and not only) by large multinationals, protected by copyright laws, effectively enslaving farmers in perpetuity, not to mention their likely dire effects on loss of crop variety.
The Food Crisis is manufactured most countries are in debt to the IMF or World Bank or other such banks or large corporations. Don't blame overpopulation blame the banks, the corporations, those operating from the shadows for the food crisis or for starving third world countries who can't even upgrade because they can't even have coal plants because of the UN's stance on "global warming". Which is under the new guise of "climate change". We are screwing around with the planet alot but I blame the system we live in and our lack of motivation to change it but I do not condone overpopulation or the means to reduce the population beyond wearing a condom and talking to people.
The corporations and bankers of the world wish to remove governments and to replace them with the banks and corporations in their stead. What better way than to control the food and water and who gets it?
Additional Edit: I've traveled outside the US and outside Texas.