Leonardo DiCaprio and President Obama in a scene from Before the Flood. Photograph: Zero Media

Obama and the pope feature in documentary, Before the Flood, that hopes to influence presidential election...

The Pacific warm blob from July 1 to July 31, 2015. (NASA Earth Observatory)

Last year, a massive toxic algae bloom swept the West Coast, resulting in record-breaking levels of a potentially deadly brain-damaging chemical and closing fisheries from California to British Columbia. Since then, scientists have been investigating the causes of the event — and now, a group of researchers think they’ve figured out how the event, which they term “unprecedented,” happened...

Cows graze on the Turnercrest Ranch near Wright, Wyoming. (Photo: Ed Glazar)

Wyoming has reaped billions of dollars from oil drilling and coal mining, but ranchers are losing their water, land, and livelihoods...

CREDIT: AP Photo/Manuel Baice Cenata

The Obama administration’s most ambitious effort to fight climate change hangs in the balance...

"You are going to like Donald Trump," the Republican nominee told a roomful of fracking supporters last week. Evan Vucci/AP

Trump adviser and potential EPA head gives a glimpse into what one aspect of his administration would look like...

U.S. President Barack Obama, right, and Chinese President Xi Jinping, center, shake hands as U.N. Secretary-General Ban Ki-moon stands during a climate event at the Ruyi Hall at West Lake State House in Hangzhou in eastern China's Zhejiang province, Saturday, Sept. 3, 2016. (AP /Carolyn Kaster)

The US and China have joined the Paris Agreement. Here’s what it means for the climate...

CREDIT: AP PHOTO/LM OTERO, FILE

The Conservation Law Foundation wants to take Exxon to court over water pollution in Massachusetts...

The Jaenschwalde brown coal-fired power plant in Lusatia, near Germany's border with Poland. credit: Lothar M Peter

You know what unicorns, the tooth fairy, and clean coal all have in common? They aren’t real...

More than 190 nations meeting in Paris in December 2015 reached a landmark agreement to strengthen the global climate effort. The Paris Agreement commits countries to undertake “nationally determined contributions” and establishes mechanisms to hold them accountable and to strengthen ambition in the years ahead...

 Trump and Clinton face off in first debate Sept 26th 2016.

Republican presidential candidate Donald Trump’s energy policy to dig, drill, and frack as much fossil fuel out of the ground as possible only really works by denying two realities...

The first ever Faith for Climate meeting at St John's, Waterloo.

The role of faith in fighting intolerance, protecting the planet, and trumping Trump...

Exxon sign at an Exxon gas station in Carnegie, Pennsylvania. Image: Gene J. Puskar/AP

Exxon's climate change-related legal problems are growing by the day...

In this Monday, Sept. 26, 2016, photo, Republican presidential nominee Donald Trump answers a question during the presidential debate with Democratic presidential nominee Hillary Clinton, at Hofstra University in Hempstead, N.Y. (AP Photo/David Goldman, File)

A new scientific statement released Thursday — underscoring the urgency of grappling with global warming — presented a sharp contrast with the state of public discussion of the subject in the United States...

One policy expert at Brookings characterized Trump’s assertion that he would put the coal industry back to work as ‘erroneous and fanciful’. Photograph: David Goldman/AP

From making coal great again to ‘cancelling’ the Paris accord, industry analysts say his ideas are farfetched and his talk of climate change as a ‘hoax’ is dangerous...

A trove of climate data in Asheville, N.C. could drive both innovation and new jobs...

This high-resolution animation shows carbon dioxide emitted from fires and megacities over a five day period in June 2006. The model is based on real emission data so that scientists can observe how the greenhouse gas behaves once it has been emitted. (Global Modeling and Assimilation Office, NASA's Goddard Space Flight Center)

Countries around the world are trying to get their greenhouse gas emissions under control — to see them inch down, percentage point by percentage point, from where they stood earlier in the century...

An artist's conception showing a possible layout of a commercial rocket and spacecraft positioned at Launch Pad 39A at NASA's Kennedy Space Center in Florida.

NASA Is Sinking...

Joe Raedle/Getty Images

The melting Arctic has become this decade’s Amazon deforestation crisis. There’s no Sting album or fair trade coffee fundraiser, but the world’s attention turns north with each piece of distressing news of the catastrophic polar melt...

The lid of Camp Century’s unsealed nuclear fuel vessel, pictured in 1962. Photograph: W Robert Moore/National Geographic/Getty Images

Camp Century – part of Project Iceworm – is an underground cold war network that was thought to have been buried forever...