"Global warming 'means that if we don't fix the climate, everything will be destroyed and we won't be able to survive,' two students wrote. Others found their global warming lessons similarly frightening," Martin wrote.

The students also left no room for discussion of the scientific issue.

"We've read article about global warming. And we know all the facts," said one, while another added, "Natural disasters have quadrupled in 20 years, 53 bird species face extinction, World must fix climate in 10 years, Air pollution shrinks fetus size. THIS IS CAUSED BY GLOBAL WARMING!!!" said another.

When the Heartland Institute held its conference in New York in March, WND reported more than 100 internationally prominent environmental scientists argued that global warming is, instead, a natural process and not the result of human activity.

"The purpose of the conference is to provide a platform for the hundreds of scientists, economists, and policy experts who dissent from the so-called 'consensus' on global warming," said Bast.

"Is global warming 'An Inconvenient Truth,' as Vice President Al Gore charges, or a 'Global Warming Swindle?' Harriet Johnson, spokeswoman for the Heartland Institute asked in a statement distributed at the conference.

"The alarmists in the global warming debate have had their say – over and over again, in every newspaper in the country practically every day and in countless news reports and documentary films," a notice on the Heartland Institute website said. "But they have lost the debate."

In one of the papers released, environmental scientist S. Fred Singer's "Nature, Not Human Activity Rules the Climate" summarized a three-year international scientific research project conducted by the Nongovernmental Panel on Climate Change, or NIPCC.