It has been recently revealed that some of the leaked secret documents of Heartland, a prominent organization, have denied man-made global warming. For a long time, a controversy was going in which Heartland and scientists, environmentalists used to fight over global warming issue.

Heartland, the think tank of libertarian in Chicago used to say that global warming has not happened due to any act of human, and environmentalists used to provide proofs about the human involvement in causing and increasing global warming.

The leaked report has revealed that Heartland has received donations from the liquor and tobacco industries, and the General Motors Foundation. It has also received donation of more than $14 million from an anonymous donor. Heartland officials have not said much about it, but have told that all the papers are not right.

Heartland officials told that the papers that have been leaked have been prepared by the Heartland's president for a board meeting and they are not sure about the authenticity of the papers. However, one of the press committee tried to find out the truth. It was revealed then that all the leaked information is right and the company has been using the money to serve the government and other prominent businessmen.

Harry Lambright, a Syracuse University Public Policy Professor, said, "Scientifically there is no controversy. Politically, there is a controversy because there are political interest groups making it a controversy”. Heartland is not accepting the truth due to political reasons, further affirmed Harry. It is also said that they have been influencing children also and telling them untruth about global warming.

In addition, it has also been revealed that Heartland has also been planning to promote the ability of patients to use experimental drugs. They revealed that the project is million-dollar deal.