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Since 2000, the federal government has published a comprehensive look with rising temperatures every few years, which affect human health, agriculture, fishing, water supply, transport, energy generation and other aspects of the US economy. The last climate assessment was published in 2023 and is used by state and local governments and private companies to prepare for the effects of heat waves, floods, droughts and other air -conditioned disasters.

On Monday, researchers across the country who had started working on the sixth national climate evaluation, which were planned for early 2028, received an email in which they were informed that the scope of the report was currently being re-evaluated “and that all participants were released.

“We are now publishing all current rating participants from their roles,” says the e -mail. “If plans for the evaluation develop, there may be future opportunities to make a contribution or to get involved. Thank you for your service.”

For some of the authors, this seemed to be a fatal blow for the next report.

“This is as close as a termination of the evaluation,” said Jesse Keenan, professor at Tulane University, who specializes in climate adaptation and was the co-author of the last climate evaluation. “If you get rid of everyone involved, nothing moves forward.”

The White House did not immediately answer a request for comments.

The climate assessment is usually compiled by scientists and experts across the country, who voluntarily report for the report. It then goes through several review rounds from 14 federal authorities and a public comment period. The entire process is monitored by the Global Change Research Program, a federal group established by the Congress in 1990, which is supported by NASA.

After the Trump management, this process was already confronted with serious disorders. This month, NASA began a major contract with ICF International, a consulting company that provided most of the technical support and personnel for the Global Change Research Program, which coordinates the work of hundreds of participants.

President Trump has often rejected the risks of global warming. And Russell Vouht, the current director of the Office for Management and Household, wrote before the election that the next president should “redesign” the global change research program, since his scientific reports on climate change were often used as the basis for environmental forces that restricted the Federal Government's measures.

Mr. Vought has described the government's largest climate research unit, a department in the national ocean and atmosphere, a source of “climate alarmism”.

During Mr. Trump's first term, his government tried, but failed to derail national climate evaluation. When the 2018 report came out and concluded that global warming was an immediate upcoming and bad threat, the administration made it an obvious attempt to minimize attention the day after Thanksgiving.

In February, scientists submitted a detailed overview of the next assessment for a first review to the White House. However, this review was postponed in the queue and the agency's determination period was postponed.

It remains to be seen what happens next with the assessment that is still prescribed by the congress. Some scientists feared that the administration could try to write a completely new report from the ground up in which the risks of rising temperatures are reduced or disagrees with established climate science.

“There can certainly be a sixth national climate evaluation,” said Meade Krosby, senior scientist at the Climate Impacts Group of the University of Washington and a contribution to evaluation. “The question is whether it will reflect credible science for our communities and be effective if they prepare for climate change.”

Scientists who are involved in previous climate assessments said that the report was invaluable to understand how climate change would have a daily life in the United States.

“It takes this global problem and brings us closer,” said Katharine Hayhoe, climate scientist at Texas Tech University this month. “If I am interested in food, water or transport or insurance or my health, this means climate change for me when I live in the southwest or in the large levels. That is the value.”

Many state and local political decision -makers and private companies rely on the evaluation to understand how climate change affects different regions of the United States and how they can try to adapt.

And while the scientific understanding of climate change and its effects has not changed drastically since the last rating in 2023, Dr. Keenan von Tulane that there was a constant progression of research about what communities can do with the deterioration of forest fires, higher sea levels and other problems enlarged by increasing temperatures.

Decision-makers who are forced to refer to the final assessment would rely on outdated information about the adaptation and reduction measures, scientists said.

“We would lose the cornerstone report that the public with the risks with which we are confronted with climate change and how we can progress,” said Dustin Mulvaney, professor of environmental studies at San Jose State University, the author of the regional chapter in Southwest. “It's pretty devastating.”