Since Jan. 20, Trump’s administration has enthusiastically and systematically undone or uprooted rules, policies and tools that predated his time in office. Below, a list of those changes, roughly organized by subject area.

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The economy

Withdrew from the Trans-Pacific Partnership. The trade deal would have established a trade partnership between the United States and countries on the Pacific Rim.

Revoked a rule that expanded the number of people who could earn overtime pay.

Reversal of a rule that would mandate that oil and gas companies report payments to foreign governments. The Securities and Exchange Commission will no longer receive this information.

Ended limits on the ability of states to drug test those seeking unemployment benefits.

Revoked an executive order that mandated compliance by contractors with laws protecting women in the workplace. Prior to the 2014 order, a report found that companies with federal contracts worth millions of dollars had scores of violations of labor and civil rights laws.

Repeal of a rule allowing states to create retirement savings plans for private-sector workers.

Cancelled a rule mandating that financial advisers act in the best interests of their clients.

Repeal of a bill that mandated that employers maintain records of workplace injuries.

Killed a rule mandating that government contractors disclose past violations of labor law.

The justice system

Rescinded an Obama effort to reduce mandatory sentences. Attorney General Jeff Sessions ordered that prosecutors seek the most stringent penalties possible in criminal cases.

Cancelled a phase-out of the use of private prisons.

Reversed a ban on civil forfeiture. Law enforcement officials are now once again able to seize assets from suspects who haven’t been convicted of any crime.

Reversed the government’s position on a voter ID law in Texas. Under the Obama administration, the Justice Department argued that the law had discriminatory intent. Under Sessions, Justice withdrew that complaint. On Wednesday, a federal court threw out the law.

Reviewed Justice Department efforts to address problematic police departments. An effort to address concerns in the Baltimore Police Department was delayed.

The environment

On Friday, Politico reported that some representatives of oil and gas companies are worried that Trump’s moving too quickly to reverse regulations on their industry. “[Y]ou don’t need to roll things back so far that it opens an opportunity for outsiders to criticize, or something bad happens,” one analyst said.

Withdrew from the Paris climate agreement.

Blocked the Clean Power Plan. The plan implemented under Obama focused on reducing greenhouse gas emissions from power plants.

Ended a study on the health effects of mountaintop-removal mining. The process involves blasting away the tops of hills and mountains to get at coal seams under the surface.

Rescinded a rule mandating that rising sea levels be considered when building public infrastructure in flood-prone areas.

Reversed an Obama ban on drilling for oil in the Arctic.

Reviewed the status of national monuments for possible reversal. In April, Trump signed an executive order ordering a review of monuments added in the past 20 years, opening up the possibility that some areas previously set aside would have that status revoked.

Withdrew a rule regulating fracking on public land.

Rejected a proposed ban on the pesticide chlorpyrifos. The month after this decision, a group of farmworkers were sickened by exposure to the chemical.

Reversed a ban on plastic bottles at national parks.

Repealed a ban on lead bullets. The bullets were banned under Obama because the lead can poison wildlife.

Rescinded a limit on the number of sea animals that can be trapped or killed in fishing nets.

Delayed and potentially rolled back automotive fuel efficiency standards.

Repealed the Waters of the United States rule. This rule expanded the definition of water bodies that were protected by the Environmental Protection Agency.

Ended a rule banning dumping waste from mining into streams.

Reversed a rule banning hunting bears and wolves. The ban applied to federal refuges in Alaska and prohibited hunting predators using certain methods.

Repealed a rule that would have centralized federal land management.

Removed a bike-sharing station at the White House.

Foreign policy and immigration

Cut the number of migrants and refugees allowed from seven predominantly Muslim countries.

Repealed a rule allowing transgender individuals to serve in the military.

Rolled back of Obama’s outreach to the Cuban government.

Ended the Deferred Action for Parents of Americans and Lawful Permanent Residents program. DAPA extended protections for some immigrant parents whose children were citizens of or residents in the United States.

Education

Rolled back school lunch standards championed by Michelle Obama.

Withdrew federal protections for transgender students in schools. Under the rule approved by Obama, transgender students could use school bathrooms that corresponded to their gender identities.

Reversed a rule that mandated how achievement is measured in schools.

Repealed a rule mandating certain requirements for teacher-preparation programs.

Other areas

Halted or cancelled hundreds of other minor regulatory actions.

Revoked a ban on denying funding for Planned Parenthood at the state level.

Repealed a rule mandating that Internet service providers seek permission before selling personal information.

Slow or nonexistent staffing at the Senate-confirmed and management level across administration agencies.

Repealed a rule mandating consolidation of transit planning authorities.

Ended the declaration of June as Pride Month and the practice of recognizing the end of Ramadan with an iftar dinner.

Cancelled public reporting on visitors to the White House and other online data.