Andrés Manuel López Obrador faces tough challenges in the coming months.

Denmark will ban the sale of new fossil-fueled cars in 2030 and aims to have more than 1 million electric or hybrid vehicles on its roads by then, Prime Minister Lars Løkke Rasmussen told Parliament yesterday.

Top researchers are huddled with government officials in South Korea this week to confront the scientific consensus that maintaining a safe global climate will require immediate and aggressive action.

An analyst at a free-market group with ties to the Koch brothers predicted yesterday that public transit would soon become obsolete.

Mitt Romney's likely election to the Senate next month has triggered a new round of questions about how he views climate change and what — if anything — he wants to do about it.

Exchange-traded funds, the millennials of the investing world, are staying on-trend. The latest? Going vegan.

Drax Group PLC's Chief Executive Officer Will Gardiner has joined scores of other company bosses in starting to make preparations for the U.K. leaving the European Union without a trade deal.

The United Nations' highest court has rejected landlocked Bolivia's bid to force Chile to the negotiating table over granting access to the Pacific Ocean.

In less than 12 hours, Prime Minister Justin Trudeau scored two of the biggest economic wins of his political career.

A top environmental group in Colorado plans to spend at least $3.2 million to help Democrats take control of the state Legislature and governor's mansion.

CHICAGO — Some participants at yesterday's public hearing and protests on the Clean Power Plan replacement are challenging whether the process is really giving enough access to the people most likely to be affected by the proposed rule change.

EPA has hired a chemical engineer from Koch Industries Inc. to serve as the top political appointee in the agency's science office.

A California beach city promised yesterday to challenge the state if it seeks to impose "managed retreat" as rising seas erode the shoreline and threaten homes.

A key data point has been buried in the back-and-forth over the Trump administration's rollback of former President Obama's climate legacy: EPA's own research has found that lifting public health protections on air pollution could kill thousands of Americans.

LIMOTO, Uganda — Uganda's climate-stabilizing wetlands are being destroyed by subsistence farmers seeking new plots, according to the country's government. But with help from the U.N.-sanctioned Green Climate Fund, it has struck upon a new approach.

Germany's government is preparing a second round of potentially costly measures to reduce pollution from diesel vehicles as the country struggles to come to terms with excess emissions three years after Volkswagen AG admitted to cheating.

The smelly reality is that cows will always pass gas. But if farmers had more access to seaweed, cow flatulence might just stink a little less for the planet.

A typhoon is bringing Tokyo to a standstill.

An early warning system that might have prevented some deaths in the tsunami that hit an Indonesian island Friday has been stalled in the testing phase for years.

Atmospheric changes caused by a rapidly warming Arctic may be contributing to longer dry spells and extended rainy periods in the United States, a new study finds.