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en.wikipedia.org/wiki/Global_warming_controversy

The global warming controversy concerns the public debate over whether global warming is occurring, how much has occurred in modern times, what has caused it, what its effects ...... If we truly believe in warming, then we've already decided we're going to adjust...The reason we adjust to things far better than Bangladesh is ...

climate.nasa.gov/causes

Vital Signs of the Planet: Global Climate Change and Global Warming. What is the “greenhouse effect”? What is causing it? Are humans to blame? What does ...

climate.nasa.gov/evidence

Vital Signs of the Planet: Global Climate Change and Global Warming. ... There is no question that increased levels of greenhouse gases must cause the Earth to warm .... http://www.pmel.noaa.gov/co2/story/What+is+Ocean+Acidification%3F.

www.nationalgeographic.com/environment/global-warming/global-warming-causes

The temperature of the earth is rising at nearly twice the rate it was 50 years ago. This rapid rate and pattern of warming, scientists have concluded, cannot be ...

www.pbs.org/wgbh/nova/next/earth/climate-change-acceptance

Nov 19, 2014 ... Only 40% of Americans attribute global warming to human activity, according to a recent ... most Americans don't believe that humans are causing climate change. ... In the 1990s, Michael Ranney started informally asking people what they ... “ For many Americans, they're caught between a radio talk show ...

whatsyourimpact.org/global-warming

Global warming is the current increase in temperature of the Earth's surface ... Global warming is caused by the increase of greenhouse gases in our atmosphere. ... P.M. Cox, R.E. Dickinson, D. Hauglustaine, C. Heinze, E. Holland, D. Jacob, ...

www.edf.org/climate/what-sparked-global-warming-people-did

Carbon dioxide has caused most of the warming, science tells us. ... such as driving the speed limit, recycling and unplugging electronics you're not using. ... Scientists are more confident than ever that humans are causing global warming.

www.ucsusa.org/global_warming/science_and_impacts/science/human-contribution-to-gw-faq.html

How do we know that humans are the major cause of global warming? Direct evidence of human contribution to atmospheric CO2; The combination of natural  ...

www.takepart.com/flashcards/what-is-climate-change

Learn about the causes of climate change and how you can reduce its threat.

www.theguardian.com/environment/climate-consensus-97-per-cent/2014/sep/15/97-vs-3-how-much-global-warming-are-humans-causing

Sep 15, 2014 ... The green bar shows the amount of warming caused by human greenhouse gas ... global surface warming since 1950 as it is that we're only responsible for 50%. ... That's what the scientific evidence overwhelmingly shows.