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NASA adheres to the widely quoted statistic that "97% or more of the active climate climatologists agree," that warming trends are the result of human activity, while listing 200 scientific organizations from around the world who share the same conclusions.
The other about 3% who reject the anthropogenic warming? It turns out that scientists came back to try to recreate the results of these studies – and in each of them discovered major methodological flaws.
Costs and consequences
What Mr. Trump said
"I will say that. I do not want to give billions and billions of dollars. I do not want to lose millions and millions of jobs. I do not want to be disadvantaged. "
Facts
Doing nothing could cost billions of dollars.
The President refers in large part to the Paris Agreement, the voluntary pact between nearly 200 countries to limit greenhouse gas emissions, which the Trump administration has committed to to withdraw. In announcing that the United States would drop the Paris deal, Mr Trump claimed that it would have cost 2.7 million US jobs by 2025 and untold economic revenues.
The figures come from think tanks opposed to the Paris Agreement. And if the economy is less precise than science, here is another factor of balance: Stanford University researchers found this year that achieving the goals of the agreement of Paris would save tens of billions of dollars in weather damage avoided, far exceeding the most estimated costs.
Science and politics
What Mr. Trump said
"Look, scientists also have a political agenda."
Asked about the scientists who say that hurricanes and other extreme weather events are worsening, Trump said, "You have to show me scientists because they have a very big political agenda."
Facts
The scientists dispute that.
There is no doubt that climate change has become political. And the climate-skeptics Sunday evening applauds Mr. Trump's remark. But scientists have shadowed the notion that their research has an agenda. Here are three with their own words:
Katharine Hayhoe, climatologist, Texas Tech University: "A thermometer is neither democratic nor republican. This does not give us a different answer depending on how we vote. "
Andrew Dessler, climatologist, Texas A & M University: "Basically, this is a crazy plot theory," he wrote. "It is important to realize that there has never been a plot in a field as vast as science. And it should be an extremely massive conspiracy, given the thousands of scientists who work there. On the other hand, there have been many examples (cigarettes, whoever?) In which political activists have tried to cast doubt on an extremely solid science. This is what happens here.
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