The Heartland Institute: The heartland institute can be classified as a category 2; Human GHG are not causing global warming. In the 'About' section on Climate change, they have included the following quote: “There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth’s atmosphere and disruption of the Earth’s climate.” As well, it can be classified under section 5; Climate movement / science is unreliable. In a recent article titled "Will Climate…