A new documentary shows how a "professional class of deceivers" has been paid by the fossil fuel industry to cast doubt on the science of climate change, in an effort akin to that from the tobacco industry, which for decades used deceitful tactics to deny the scientific evidence that cigarettes are harmful to human health. The film, Merchants of Doubt, explores how many of the same people that once lobbied on behalf of the tobacco industry are now employed in the climate denial game.
An infamous 1969 memo from a tobacco executive read: "Doubt is our product since it is the best means of competing with the 'body of fact' that exists in the minds of the general public. It is also the means of establishing a controversy." Using similar tactics, a very small set of people have had immense influence in sowing doubt on the scientific consensus of manmade climate change in recent years.