Global Warming:

It is the rising average temperature of Earth’s atmosphere and oceans since the late 19th century and its projected continuation.

Global Warming Deniers:

Those who believe that climate change is natural and has nothing to do with the climate are known as global warming deniers.

Climate change deniers are contrarians who challenge the evidence that human activities such as deforestation and human behaviors that result in more greenhouse gases like carbon dioxide are causing changes in our planet’s climate that may prove devastating and irreversible. Contrarians pose as skeptics, refusing to accept consensus conclusions in science on the ground that there is still some uncertainty. True skeptics raise specific doubts about specific claims and do not try to debunk a whole area of science by an occasional error or by the general lack of absolute certainty, which is unattainable in any area of science.

What they say?

The global warming deniers made many arguments about global warming. They say:

• “Extreme weather isn’t caused by global warming”
• “Sea level rise is exaggerated”
• “It’s Urban Heat Island effect”
• “Increasing CO2 has little to no effect”
• “Oceans are cooling”
• “Water vapor is the most powerful greenhouse gas”
• “Polar bear numbers are increasing”
• “Other planets are warming”
• “There’s no correlation between CO2 and temperature”
• “Greenhouse effect has been falsified”

Resources:

http://en.wikipedia.org/wiki/Global_warming

http://www.skepdic.com/climatedeniers.html

http://www.skepticalscience.com/argument.php