evidence: "No," said Pruitt. "I believe that measuring, with precision, human activity on the climate is something very challenging to do, and there’s tremendous disagreement about the degree of impact. So, no, I would not agree that it’s a primary contributor to the global warming that we see." [...] This conclusion only strengthened throughout the 2000s. By 2013, the Intergovernmental Panel on Climate Change announced that there was at least a 95 percent chance that CO₂ was causing global warming. [...] In 2009, the EPA formally agreed, announcing that carbon dioxide and five other greenhouse gases endangered public health and welfare by causing global warming.