1. ABC News, 2009. ABC News/Washington Post poll: Global Warming, Conservatives, Republicans move away from belief that the earth is warming, Nov. 2009. (http://abcnews.go.com/images/PollingUnit/1096a7GlobalWarming.pdf, download 28.2.2011).
2. AngusReid PublicOpinion, 2010. Americans and Britons Becoming More Skeptical of Climate Change, (http://www.visioncritical.com/wp-content/uploads/2010/04/2010.04.26_Climate.pdf, download 12.7.2010).
3. AngusReid, 2009. Global Warming a Fact in Three Western Countries, (http://www.angus-reid.com/polls/view/global_warming_a_fact_in_three_western_countries/, download 27.9.2019).
4. BBC News, 2010. Climate scepticism ‘on the rise’, BBC poll shows, February 7, 2010 (http://news.bbc.co.uk/2/hi/science/nature/8500443.stm, download 9.8.2010).
5. BBC, Climate Change Poll – February, 2010. (http://news.bbc.co.uk/nol/shared/bsp/hi/pdfs/05_02_10climatechange.pdf, download 9.8.2010).