"Science is becoming a matter of belief, opinion and even ideology" says Francois Gemenne, political scientist and member of the Intergovernmental Panel on Climate Change (IPCC).
"I see the Republican candidates in the United States who don't accept the scientific reality of climate change" he adds, speaking during an interview with AFP.
Gemenne worries that if "science and fact become a matter of belief... we can't move forward in a democracy."