Vivek Ramaswamy says the ‘climate change agenda’ is a hoax - NBC News
Vivek Ramaswamy says the ‘climate change agenda’ is a hoax
DeSantis campaign declares 'a win' after first debate 01:48
At first GOP debate, Ramaswamy becomes chief target 06:09
Pence, Ramaswamy spar in heated Republican debate 01:07
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GOP presidential hopefuls set to take debate stage without Trump 01:26
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Related Knowledge Center: Climate science
What began as a theory in the 1890s — that industrial emissions of carbon dioxide could increase global temperatures — had progressed to a scientific fact a century later. Scientists across a range of disciplines are studying the impact of the still-growing concentration of carbon dioxide and other so-called “greenhouse gases” in the atmosphere as they call for industrial and governmental policies to slow, then halt, the warming of the planet.