The 13-agency consensus found in the second volume of the Fourth National Climate Assessment makes it clear the world is barreling toward catastrophic ― perhaps irreversible ― climate change. It says warming-charged extremes "have already become more frequent, intense, widespread or of long duration".
The changes highlighted in the report "threaten the health and wellbeing of the American people" and "further disrupt many areas of life, exacerbating existing challenges and revealing new risks", says David Easterling, a report author and scientist at the National Oceanic and Atmospheric Administration (NOAA).
US President Donald Trump refers to amounts of temperature change as he announces his decision that the United States will withdraw from the landmark Paris Climate Agreement, in the Rose Garden of the White House in Washington, US, June 1, 2017.
The federal report says the last few years have smashed records for damaging weather in the US, costing almost $400 billion since 2015.
And Donald Wuebbles, a co-author from University of IL climate scientist, said, "We're going to continue to see severe weather events get stronger and more intense". It also details how people's health and different parts of the economy are being hurt.
"Earth's climate is now changing faster than at any point in the history of modern civilization, primarily as a result of human activities", the report reads. The White House report quietly issued today also frequently contradicts President Donald Trump.
The air pollution from wildfires combined with heat waves is a major future health risk for the west, the report says.
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What makes the report different from others is that it focuses on the U.S., then goes more local and granular.
"All climate change is local", said Pennsylvania State University climate scientist Richard Alley, who wasn't part of the report but praised it.
At the time, Mr Trump said he wanted to negotiate a new "fair" deal that would not disadvantage U.S. businesses and workers.
But federal officials faced criticism over its timing, with environmentalists, Democratic lawmakers and scientists among those accusing the Trump administration trying to bury the report by releasing it early, on a slow news day the Friday after Thanksgiving. The report often clashes with the president's past statements and tweets on the legitimacy of climate change science, how much of it is caused by humans, how cyclical it is and what's causing increases in recent wildfires.
Earlier this week Trump mocked climate science, tweeting about cold weather in the Northeast and asking "Whatever happened to Global Warming?" As the urgency of climate change continues to grow, leaders in other countries (as well as mayors and governors in the U.S.) have promised to double down on their efforts, largely leaving the USA - and, by extension, Trump - by the wayside as the world adapts to changes driven by global warming.
Study co-author Andrew Light, an worldwide policy expert at the World Resources Institute, told The Associated Press that the release " "is a transparent attempt by the Trump administration to bury this report and continue the campaign of not only denying but suppressing the best of climate science".
"The Bush, Obama and now Trump Administrations have all published reports showing the current and future impacts to the United States from climate change".