The report, "Fewer Emitters, Lower Emissions, Less Cost," (PDF) determined that if contraception was made widely available between 2010 and 2050 to women and men around the world who wished to use it, the reduction in unwanted births could result in saving 34 gigatonnes (one billion tonnes) of carbon emissions. That's roughly 60 years worth of U.K. emissions or 6 years worth of U.S. emissions.
- Fewer Emitters, Lower Emissions, Less Cost, a Cost/Benefit Analysis; Thomas Wire; August 2009 (pdf)
- Sexual and reproductive health and climate change; The Lancet, Volume 374, Issue 9694, Page 949, 19 September 2009 doi:10.1016/S0140-6736(09)61643-3
- Managing the health effects of climate change; The Lancet, Volume 373, Issue 9676, Pages 1693 - 1733, 16 May 2009 doi:10.1016/S0140-6736(09)60935-1
- Should contraception qualify for climate funds? by Candace Lombardi; September 17, 2009