Elon Musk tweeted he is "cautiously optimistic" the president will make a "positive decision" on the Paris agreement.

Friday’s ceremony in New York City, coinciding with Earth Day, arrives amid troubling reports about the impact of global warming.

U.S. and global businesses face growing financial risks from carbon policies and the effects of climate change. But few disclose threats to investors, experts say.

The U.S. still comes up short on aggressive policies and investments to develop a clean energy boom that drives future growth.

World leaders will have to balance domestic concerns and global realities in order to implement the agreement's key provisions.

Leaders of almost 200 countries OK'd the pact that aims to hold the global temperature increase below 2 degrees Celsius above preindustrial levels.

The president touted the American team's role at the Paris conference, while arguing the country's investments in solar and wind energy are creating middle-class jobs.

In the wake of the new climate-change agreement, enthusiasm for sustainable energy-producing alternatives is likely to swell. Here are a few possibilities.

However, China and a number of other developing countries say they are pleased with the new agreement.

After more than 20 years of failed attempts, most of the world's countries have agreed to cap increases in temperatures and curb the consumption of fossil fuels.

A years-long effort for a universal pact to prevent catastrophic climate change may be concluding.

Diplomats are racing to resolve a handful of key sticking points this weekend as countries seek to dramatically reduce their dependence on fossil fuels.

In his first big speech of the climate negotiations, Secretary of State John Kerry announced today the U.S. would double its spending to help poorer nations adapt to climate change.

A new study, presented at the climate summit in Paris, suggests a drop in China's coal consumption may have reduced global carbon dioxide emissions this year.

A new agreement to fight climate change is more likely as negotiators approved a draft at talks outside Paris Saturday.

Emissions and rising temperatures are already having a devastating impact on the continent, where nations lack resources to confront the impacts of climate change.

According to a new survey, over the past decade, climate change has forced a large number of people from three Pacific island nations -- Kiribati, Tuvalu and Nauru -- to flee their countries.

Environmental groups said they planned to protest the Dec. 10 auction in Washington, where officials will offer parcels of public land for oil and gas development.

According to a new report by Oxfam, the poorest half of the world — approximately 3.5 billion people — are responsible for only 10 percent of all carbon emissions.

Major U.S. businesses joined the White House this week in voicing support for an aggressive outcome at the United Nations climate change talks in Paris.