Jan 20 (Reuters) - U.S. President Donald Trump on Monday

issued a flurry of executive orders and directives as he sought

to put his stamp on his new administration on matters ranging

from energy to criminal pardons and immigration.

Here are some of the key executive orders signed on Trump's

first day back in office:

PARDONS

Trump pardoned about 1,500 people who stormed the U.S.

Capitol on Jan. 6, 2021, in a sweeping gesture of support to the

people who assaulted police as they tried to prevent lawmakers

from certifying his 2020 election defeat.

"We hope they come out tonight, frankly," Trump said. "We're

expecting it."

The far-reaching action also cuts short the sentences of 14

members of the far-right Proud Boys and Oath Keepers

organizations, including some who were convicted of seditious

conspiracy.

The document also directs the U.S. attorney general to drop

pending cases related to the riot.

IMMIGRATION

Trump signed orders declaring illegal immigration at the

U.S.-Mexico border a national emergency, designating criminal

cartels as terrorist organizations, and targeting automatic

citizenship for U.S.-born children of immigrants in the country

illegally.

Trump's order dealing with U.S. refugee resettlement will

suspend the program for at least four months and will order a

review of security to see if travelers from certain nations

should be subject to a travel ban, the official said.

"The United States lacks the ability to absorb large numbers

of migrants," the order said.

UNDOING BIDEN ACTIONS

At a rally at a sports arena, Trump revoked 78 executive

actions of the previous administration.

"I'll revoke nearly 80 destructive and radical executive

actions of the previous administration," Trump said.

Trump also said he will sign an order directing every agency

to preserve all records pertaining to "political persecutions"

under the Biden administration.

The rescission applied to executive orders spanning from

former President Joe Biden's first day in office in 2021 to as

recently as last week, and covered topics from COVID relief to

the promotion of clean energy industries.

DIVERSITY

Trump also rescinded executive orders that had promoted

diversity, equity and inclusion (DEI) and promoted rights for

LGBTQ+ people and racial minorities, fulfilling promises to

curtail protections for the most marginalized Americans.

Among the 78 repealed executive orders signed by Biden,

including at least a dozen measures supporting racial equity and

combating discrimination against gay and transgender people.

TIKTOK BAN

Trump signed an order to delay a ban for 75 days of popular

short-video app TikTok that was slated to be shuttered on Jan.

19. The order directs the attorney general to not enforce the

law "to permit my administration an opportunity to determine the

appropriate course of action with respect to TikTok."

REGULATORY, HIRING FREEZES

Trump signed orders freezing government hiring and new

federal regulations, as well as an order requiring federal

workers to immediately return to full-time in-person work.

"I will implement an immediate regulation freeze, which will

stop Biden bureaucrats from continuing to regulate," Trump said,

adding he will also "issue a temporary hiring freeze to ensure

that we're only hiring competent people who are faithful to the

American public."

The move would force large numbers of white-collar

government employees to forfeit remote working arrangements,

reversing a trend that took off in the early stages of the

COVID-19 pandemic.

Some of Trump's allies have said the return-to-work mandate

is intended to help gut the civil service, making it easier for

Trump to replace long-serving government workers with loyalists.

INFLATION

Trump ordered all executive departments and agencies to

deliver emergency price relief to the American people and

increase the prosperity of the American worker. Measures include

cutting regulations and climate policies that raise costs, and

prescribe actions to lower the cost of housing and expand

housing supply.

"Over the past 4 years, the Biden Administration's

destructive policies inflicted an historic inflation crisis on

the American people," the order said.

CLIMATE

Trump also signed a withdrawal from the Paris climate

treaty, including a letter to the United Nations explaining the

withdrawal.

The announcement, which has been widely expected ever since

Trump won the Nov. 5 presidential election, further threatens

the central goal of the agreement to avoid a rise in global

temperatures of 1.5 degrees Celsius, a target that appears even

more tenuous as last year was the planet's hottest on record.

"It is the policy of my Administration to put the interests

of the United States and the American people first," the order

said.

He repealed a 2023 memo from Biden that barred oil drilling

in some 16 million acres in the Arctic, saying government should

encourage energy exploration and production on federal lands and

waters, and eliminated an electric vehicle (EV) mandate.

HEALTH

Another order withdrew the United States from the World

Health Organization, saying the global health agency had

mishandled the COVID-19 pandemic and other international health

crises.

The plan, which aligns with Trump's longstanding criticism

of the U.N. health agency, marks a dramatic shift in U.S. global

health policy and further isolates Washington from international

efforts to battle pandemics.

Trump has nominated several critics of the organization to

top public health positions, including Robert F. Kennedy Jr., a

vaccine skeptic who is up for the post of secretary of Health

and Human Services, which oversees all major U.S. health

agencies including the CDC and FDA.

GOVERNMENT EFFICIENCY

Trump signed an executive action to create an advisory group

called the Department of Government Efficiency aimed at carrying

out dramatic cuts to the U.S. government, attracting immediate

lawsuits challenging its operations.

The group - dubbed "DOGE" - is being run by Tesla

CEO Elon Musk and has grandiose goals of eliminating entire

federal agencies and cutting three quarters of federal

government jobs.

TARGETING THE 'DEEP STATE'

The president signed a document "ending weaponization" of

government against political opponents. The order directs the

attorney general to investigate the activities of the federal

government over the last four years, including at the Department

of Justice, the Securities and Exchange Commission, and the

Federal Trade Commission during the prior administration.

It said the government will "identify and take appropriate

action to correct past misconduct by the Federal Government

related to the weaponization of law enforcement and the

weaponization of the Intelligence Community."

FREE SPEECH

Trump signed an executive order that he said was aimed at

"restoring freedom of speech and ending federal censorship."

"Under the guise of combating 'misinformation,'

'disinformation,' and 'malinformation,' the Federal Government

infringed on the constitutionally protected speech rights of

American citizens," the White House said.

Trump and his Republican allies had accused the

administration of Democratic former President Biden of

encouraging suppression of free speech on online platforms.

ENERGY

Trump declared a national energy emergency, promising to

fill up strategic oil reserves and export U.S. energy all over

the world.

He laid out a sweeping plan to maximize U.S. oil and gas

production - including by declaring a national energy emergency,

stripping away excess regulation, and withdrawing the U.S. from

an international pact to fight climate change.

Trump said he expects the orders to help reduce consumer

prices and improve U.S. national security. He also signed orders

aimed at promoting oil and gas development in Alaska, reversing

Biden's efforts to protect vast Arctic lands and waters from

drilling.

The U.S. also will withdraw from the Paris climate agreement

and end leasing to wind farms, according to the White House's

website. In addition, Trump said he would revoke what he has

called an electric vehicle mandate.

The moves signal a dramatic U-turn in Washington's energy

policy after Biden sought to encourage a transition away from

fossil fuels and establish the U.S. as a leader in combating

global warming.

SACKINGS

Trump said on Tuesday he plans to remove over 1,000

appointees from the administration of former President Joe

Biden, announcing four dismissals on social media, including

celebrity chef Jose Andres and former top general Mark Milley.

"My Presidential Personnel Office is actively in the

process of identifying and removing over a thousand Presidential

Appointees from the previous Administration, who are not aligned

with our vision to Make America Great Again," Trump said in a

post on Truth Social just after midnight.

The step is likely to reignite concerns that the

president aims to replace Biden appointees with individuals

faithful to his agenda.