These are the most large “anti-environmental policies promulgated in Trump’s first 100 days, according to experts.

President Donald Trump has promulgated a broad number of policies that could damage the environment and hinder the goals for greenhouse gas reductions during his first 100 days in office, according to experts in environmental policies.
When Trump was inaugurated for his second term on January 20, his administration was prepared, destroying the record of most of the executive orders signed on the first day in office.
Several of the 54 executive orders signed on the day of the inauguration impacted the environment, including a Declaration of a national energy emergency, Withdraw the United States from the Paris Agreement for the second time and retreating drilling restrictions on federal lands and waters.
Policies are largely involved in the idea of the independence of the United States or “Put to America first“The orders indicate.
The Trump administration has been involved in a “flooding of the area” strategy to overwhelm the environmental community and make it almost impossible to respond to each executive order, Dan Esty, a professor of law and environmental policy at Yale University and former commissioner of the Department of Energy and Environmental Protection of Connecticut, said ABC News.
Although some of the “anti-environment” policies of the Trump administration, as Esty called them, are attracting more attention than others, added that the public should not ignore apparently minor reversions or actions.
“There are a series of more subtle actions that the Trump administration has taken that they also have a considerable corrosive effect on our efforts to promote action on climate change and a sustainable future more widely,” he said.

The protesters march during a “hands outside the EPA”
Jeff Kowalsky/AFP through Getty Images
An example of cited experts is the reversal of Social carbon cost Regulation, a policy implemented during the Obama administration, said Esty. This decision could rent energy and environmental regulations designed to address greenhouse gas emissions that contribute strongly to climate change, he explained.
“The demolition of the social cost of carbon has subtle but dominant effects that will really damage the protection of the environment,” Esty said.
Another example is Trump’s executive order to protect “the American energy from state overreach”, which contains a language that could Block application of state and local laws involved in the production or use of coal, oil, natural gas, hydroelectric, geothermal, biofuel and nuclear energy. The order centralizes energy regulation at the federal level and is directed to policies that restrict carbon emissions, which could further derail the decarbonization efforts and reverse clean and water protections, experts say.
Monday, the Trump Administration fired to the authors of the sixth National Climate Evaluation Report: the preeminent report of the United States Government on the risks, impacts and responses to climate change ordered by Congress and produced every four years. In an email to the authors, the administration wrote that “the scope of the NCA6 is reassessing” and the officials are “releasing all participants from the current evaluation of their roles.”
He “Climate backtrack“A database initiated by the Sabin Climate Change Center of Columbia University that tracks the steps taken by the Trump administration to reduce or eliminate federal measures of mitigation and climate adaptation, lists more than 100 actions taken since January 20.
It will be difficult to reverse the damage caused by many of these policies, he told ABC News, a professor of Environmental Sciences and Policies and former scientific advisor of President Barack Obama.
“You can’t make broken programs very quickly,” he said.
These are some of Trump’s policies that, according to some experts, could cause the greatest environmental damage.
Attempt to boost fossil fuel production
The Trump statement of a national energy emergency establishes the framework to promulgate policies that increase the national fossil fuel production, experts said.
“We need a reliable, diversified and affordable energy supply to promote the manufacturing, transport, agriculture and defense industries of our nation, and to maintain the basic concepts of modern life and military preparation,” according to an executive order. He signed.
In addition to retreating drilling restrictions, Trump also signed an executive order to expand mining and the use of coal In the United States

The Pemex Deer Park Oil Refinery, April 8, 2025, in Deer Park, Texas
Ronaldo Schemidt/AFP through Getty Images
On April 18, the Interior Ministry He announced a new high seas lease on the United States exterior continental platform.
Sam Sankar, Senior Vice President of Earthjustice, the largest public public interest law firm in the country, told ABC News that the production of US fossil fuels is at its highest point, despite Trump’s statements of an energy crisis.
In 2024, the country produced 13.2 million barrels of oil per day, breaking the record established in 2019 in 12.3 million barrels, according to data from the Energy Information Administration of the United States. In recent years, the United States has been greater producer of oil and natural gas in the world.
EPA deregulation
Several of the environmental freedoms experience the Americans today (clean air, clean water and clean rain among them, they could soon be in danger from the deregulation plans of the Environmental Protection Agency, according to experts.
On March 12, the EPA announced I was participating in the “largest deregulatory action in the history of the United States.” The measure includes emission regulations on coal, coal production and gas and the reevaluation of government findings that determined that greenhouse gas emissions heat up the planet and are a threat to public health, said EPA administrator Lee Zeldin.
“Together with President Trump, we are up to our promises to unleash American energy, reduce costs for Americans, revitalize the US automotive industry and work hand in hand with our state partners to advance our shared mission,” Zeldin said in March.

A woman holds a poster during a protest of the hands in Gunnison, Colorado, on April 5, 2025. The protesters gathered to express their concerns about the actions of President Donald Trump since they assumed the position
Don Emmer/See Press/Corbis through Getty Images
In November, when Trump announced his intention to nominate Zeldin, he said that the new EPA administrator “would guarantee fair and rapid deregulatory decisions that will be promulgated in a way to unleash the power of US companies” in a publication on its social media platform Truth Social.
Revocating these regulations would hinder the EPA’s ability to prevent Americans from getting sick from exposure to environmental pollutants, experts said.
“Any policy change that may occur under this administration will continue to protect human health and the environment,” said an EPA spokesman in response to a request for ABC comments. “They will be guided by science and law, as well as public contributions. They will also be guided by many of the executive orders issued by the president and administrator of the EPA Zeldin’s Promoting the great American return initiative. “
However, the health of Americans could suffer as a result of a radical regulation in the EPA, Sankar said.
“All regulations [Trump] Is Revolver aims to facilitate that fossil fuel manufacturers generate petrochemicals and fuel supplies, “he said.” All these things have tremendous consequences for health. “
Federal shots and budget cuts, programs
After assuming the position, Trump created the Government Efficiency Department (Doge), supervised by billionaire Elon Musk and intended to incorporate cost reduction within the federal government.
Since then, Dege has eliminated thousands of federal employees of key scientific institutions, such as the Oceanic and Atmospheric and NASA National Administration.
The White House He says Trump created dogas “Bring responsibility and transparency to federal expenditure, ensuring that taxpayers dollars are spent wisely and effectively.”
The NWS has canceled certain meteorological balloons and is dealing with personnel problems in many of its local offices as a result of the cuts, the agency announced in March.
The administration has been “reduce staff, reduce budgets, reduce programs in the range of federal departments and agencies with responsibilities to support this huge science and technology company,” said Holdren.

Dr. Tim Lueker analyzes the importance of long -term atmospheric carbon dioxide monitoring as part of the Keeling curve study at the Oceanography Institution Scripps of UC San Diego, April 11, 2025. Climate Research. “
Patrick T. Fallon/AFP through Getty Images
While the “assault” to environmental policy, as Esty called it, anticipated when entering Trump’s second mandate, sweeping personnel cuts were not.
“When people of specialization and competition leave the government, they cannot find them and re -hire them and re -assemble them in teams very quickly,” said Holdren.
Esty added: “For a long time it has been understood that a good policy depends on careful analysis and good science, and we are seeing the ability to deliver that systematically undermining.”
Meanwhile, the mentions of climate change began to disappear from public websites after the day of the inauguration.
“This can hardly be seen as something less than a wholesale attack on sources of scientific and technological innovation in this country,” said Holdren.