Politics, cash, fame: what motivates climate change deniers

Experts interviewed by AFP outlined six key things that motivate people to deny or seek to delay action.

Oil money

Studies have documented flows of cash from the fossil fuel industry to conservative US think tanks, signalled by researchers as publishers of misleading claims.

Greenpeace on the site exxonsecrets.org published documents from oil giant ExxonMobil revealing donations it made in the 1990s and 2000s to three such bodies: the Heartland Institute, the Competitive Enterprise Institute and the Cato Institute. Exxon has repeatedly denied working against climate science.

An analysis of tax documents and donor records by sociologist Robert Brulle of Brown University found that 91 climate-sceptic think tanks and lobby groups received income of $900 million in 2003-2010, largely from conservative foundations.

Since the mid-2000s, the funding has largely been channelled through philanthropic groups that conceal their donations.

"Fossil fuel companies have a long history of funding climate misinformation promulgated by conservative think tanks," Brulle told AFP.

"This misinformation has misled many Americans regarding the risks associated with climate change and has hindered actions to mitigate ."

Online climate deniers can monetise their content and become minor celebrities, researchers say.

Greenpeace has revealed oil firm ExxonMobil donated to climate-sceptic think tanks.

Some climate policies involve a tax on carbon -- distasteful to free-market devotees.

Trump has repeatedly suggested that snowfall is evidence against climate change.