1
The possible partial solution:
Provide food and assistance only if recipients (those already with children) are willing to undergo permanent sterilization.
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GLOBAL POPULATION
WORLD'S POPULATION SOON TO HIT 7 BILLION
Jul 10, 2011
CBC News
http://www.cbc.ca/news/world/story/2011/07/10/f-world-population-day-7billion.html