A team of more than 300 experts produced the report, which was extensively reviewed by the public and experts, including US federal agencies and a panel of the US National Academy of Sciences.
A long-awaited climate report that the Trump administration released on Black Friday reportedly in an attempt to bury the news, shows that climate change is already having a dramatic effect on life in the USA, and that among the things it will damage is the American economy. Sea ice will melt and coral reef ecosystems will dissolve.
The report's conclusions fly in the face of the Trump administration's efforts to countermand President Obama's policies to reduce global warming, including limiting future increases in fuel economy, scrapping a program to clean up power plants-which would have helped make current and future electric vehicles cleaner-promoting electricity production from coal, and withdrawing the USA from the Paris Climate Accord.
The White House claim that "the report is largely based on the most extreme scenario" is false, said Katharine Hayhoe, an atmospheric scientist at Texas Tech University.
On the horizon is "the potential need for millions of people and billions of dollars of coastal infrastructure to be relocated".
Previous research, including from USA government scientists, has also concluded that climate change could have severe economic consequences, including damage to infrastructure, water supplies and agriculture.
'With continued growth in emissions at historic rates, annual losses in some economic sectors are projected to reach hundreds of billions of dollars by the end of the century - more than the current gross domestic product (GDP) of many US states, ' according to the report.
And the damage will be long-lasting.
Green Car Reports respectfully reminds its readers that the scientific validity of climate change is not a topic for debate in our comments.
"The area burned by wildfire from 1984 to 2015 was twice what would have burned had climate change not occurred", the authors state.
The White House responded to the report by misrepresenting scientists' work and promising "fuller information" in the next analysis. Cooking the next report will not change the facts. "Extreme rainfall events have increased in frequency and intensity in the Southeast, and there is high confidence they will continue to increase in the future", the report said.
The report, the second of four such annual studies commissioned by Congress, concludes not only that the world's temperature is rising and but also that the preponderance of evidence suggests human actions play a role in it.
- Washington Post, with additional reporting from Associated Press writer John Lemire.