In his first few weeks, President Trump has frozen climate spending, shaken up staffing at agencies like the E.P.A. and set off a wave of legal challenges.

The court ruled that the Trump administration had a narrowly defined path to withhold some funds to the city that had been approved by Congress.

If you’re scooping up a bouquet at the grocery store, here are a few things to consider.

The acting chair, Mark Uyeda, is directing the Securities and Exchange Commission to pause its legal defense of a rule requiring companies to make climate disclosures.

Since the inauguration, billionaires who funded climate action over the last decade have avoided criticizing Trump’s climate policies.

Staff members search for spending on “climate science,” “climate crisis” and “pollution” as one of the world’s premier climate research agencies girds for cuts.

The first full draft of the assessment, on the state of America’s land, water and wildlife, was weeks from completion. The project leader called the study “too important to die.”

About 80 percent of manufacturing investments spurred by a Biden-era climate law have flowed to Republican districts. Efforts to stop federal payments are already causing pain.

Aid projects were designed to help Central Americans withstand extreme weather at home. Their end could undercut Trump’s goal of reducing migration.

President Trump tangled with its forecasters during his first term. As he slashes government spending, many wonder what that means for weather data.

Some have halted work on the Biden-era $5 billion program to build E.V. charging stations. Others plan to keep building. Most are confused.

The move would run counter to a Biden administration push to cut back on single-use plastic, which was considered a milestone.

The central bank has halted hiring to align with a White House directive and pulled back its work on climate change.

Emboldened by President Trump, West Virginia and other states are challenging the Climate Change Superfund Act, which makes corporate polluters pay for past emissions.

The Oscar-winning filmmaker Alex Gibney has sold a majority stake in his Jigsaw Productions to the philanthropist Wendy Schmidt.

By using a fiber-optic cable to detect tiny vibrations a mile below the surface, scientists discovered a surprising way that ice sheets move.

A new analysis predicts an extraordinary reversal in housing fortunes for Americans.

The pause affects billions of dollars and is delaying home repairs, factory construction and other projects, many in states that voted Republican.

In announcing a $35 billion program to bring inexpensive solar power to some 300 million Africans, officials left out two words: climate change.

Around the world, other communities are experimenting with ideas that Los Angeles could borrow as it rebuilds from disastrous wildfires.