How is hydraulic fracturing different from drilling for oil? And why is it called 'fracking'? CNN explains it to you.
A divided federal appeals court has ruled that federal regulators went too far with new rules to control air pollution in parts of the eastern United States.
What do the 2010 heat wave in Russia, last year's Texas drought, and the 2003 heat wave in Europe have in common?
A Pennsylvania court has struck down a controversial provision of a state law that stopped municipalities from controlling where natural gas companies could drill.
A German court Wednesday reactivated a request to extradite controversial conservationist and "Whale Wars" star Paul Watson to Costa Rica after Watson's lawyer told the court he had skipped bail.
Japan holds three Australian anti-whaling activists accused of illegally boarding a Japanese ship. Kyung Lah reports.
South Korea is considering hunting whales in the waters off its shores for what it says are scientific purposes, drawing criticism from environmental groups and countries around the Pacific Rim.
"We are reaching the tipping point and the tipping point according to most scientists will be in less than 10 years. We don't have much time," says human rights and environmental campaigner, Bianca Jagger.
A rigorous green certification system is recognizing the next phase of eco design, which its founders describe as "the world's greenest buildings."
Is Poland the "El Dorado" of shale gas? CNN talks to Chevron, which is investing in the controversial energy source.
Poland may be sitting on a vast natural resource that could make it energy independent.
Can the roof of your house help you breathe easier by reducing the amount of harmful pollutants from urban air?
The Empire State Building is on an energy diet.
The Obama administration tightened rules on hydraulic fracturing Friday, requiring the disclosure of chemicals used in the process when done on federal and American Indian lands.
Photographer Roger Moukarzel's exhibition showcases his work highlighting the effects of global warming in Sweden.
The battle over hydraulic fracturing in the state of New York pits farmers against environmentalists, neighbor vs. neighbor, as gas companies wait to find out if they'll be able to unlock the natural gas trapped in the Marcellus Shale formation thousands of feet below the earth's surface.
Mountain countries from around the world are seeking a common voice in global climate change negotiations to draw attention to the vulnerabilities of mountain areas.
Imagine you are sitting in your office simply doing your job and a nasty e-mail pops into your inbox accusing you of being a fraud. You go online and find that some bloggers have written virulent posts about you. That night, you're at home with your family watching the news and a talking head is lambasting you by name. Later, a powerful politician demands all your e-mails from your former employer.
Land owners get rich from fracking, but don't know about violations in their backyards. CNN Money's Poppy Harlow reports.
South Africa has an energy deficit on its hands. Too many people want fuel for their cars and electricity for their homes, and the country is struggling to keep up with demand.
The Supreme Court gave an Idaho couple another chance Wednesday to challenge a government ruling barring construction of their "dream house," an important property rights defeat for the Obama administration.
Brazilian ranchers forced to replant after deforestation turn to seed collectors. CNN's Shasta Darlington reports.
Santino Sena wades through a knee-deep swamp, snatching up green seeds about the size of ping-pong balls that float on the surface of the water.
Brazil stands at a crossroads in its efforts to preserve the Amazon rainforest as the government considers controversial legislation governing land use.
The United States is undergoing an energy boom -- but the oil and gas industry says it could be much, much bigger.
A brief uptick in traffic-related air pollution may be enough to increase a person's short-term risk of stroke, new research suggests.
A community meeting Saturday at a school where over a dozen children have developed tic-like symptoms quickly became contentious, further dividing an already-polarized community.
The fracking-led oil and natural gas boom that's received widespread attention in the mainstream press has moved to a new medium: reality TV.
President Obama's half dozen energy proposals will, by and large, benefit nearly all players in the energy space and result in lower prices for consumers, analysts say.
Beijing ushered in the Year of the Dragon with a bold move.
President Barack Obama made a pitch for continued federal support of energy research during Tuesday night's State of the Union address.
For the third year in a row energy played a central role in President Obama's State of the Union address, with the president leaning hard this year on the twin themes of increased domestic oil and gas production and the need to invest more in renewable sources.
Three anti-whaling activists were injured in a clash with Japanese whalers off the coast of Antarctica on Wednesday when the Japanese crew used grappling hooks against pursuit boats, the conservation group Sea Shepherd said in statement.
Sea Shepherd president Paul Watson discusses Japan's plans to resume whaling.
The way some Republicans talk about the Environmental Protection Agency, you would think it was created by a bunch of pot-smoking hippies communing at a nudist camp in northern California -- when in fact, the EPA was created by one of their own, Richard Nixon, in 1970.
LZ Granderson looks at calls by Republican candidates to limit or shut down the Environmental Protection Agency.
Japan on Friday handed over to Australian authorities three anti-whaling activists held aboard a Japanese vessel after illegally boarding the ship to protest Japan's annual whale hunt in Atlantic waters.
Good news for homeowners: Natural gas prices are the lowest they've been in years. And they're expected to fall even further, thanks to growing production and slack demand.
Foreign firms, hungry to cash in on the American energy boom, have invested nearly $6 billion in U.S. gas and oil drilling in the last few weeks.
Japan said Tuesday that it would hand over to Australian authorities three Australian anti-whaling activists being held aboard a Japanese vessel, but that it would press on with its annual whale hunt in the seas near Antarctica.
Chantell and Mike Sackett call their legal challenge against federal regulators a "David vs. Goliath" fight over property rights.
The tactic du jour for environmentalists trying to sell a skeptical public on tighter regulations is this: spin the thing as a job creator.
Three Australian activists are being held aboard a Japanese ship Monday after illegally boarding the vessel to protest Japan's annual whale hunt in Antarctic waters.
The Environmental Protection Agency recently finalized a rule that for the first time requires U.S. coal and oil-fired power plant operators to limit emissions of mercury and other hazardous air pollutants.
The EPA unveils new standards on toxic pollutants from coal power plants.
The Environmental Protection Agency finalized new federal standards on toxic pollutants and mercury emissions from coal power plants Wednesday, a move being praised by environmentalists but criticized by others, who predict lost jobs and a strain on the nation's power grid.
Ohio hasn't been an oil powerhouse for nearly 100 years.
For Canada, the cost of either meeting its commitments under the Kyoto Protocol, or failing to do so, was too much to bear.
China is open to accept a legally binding global agreement to reduce carbon emissions. CNN's Robyn Curnow explains.
An agreement reached Sunday in South Africa will help tackle the challenges of climate change for years to come, the United Nations' chief said.
The Environmental Protection Agency said this week that chemicals from "fracking," a controversial method of extracting natural gas from the ground, have polluted groundwater in Wyoming.
The Japanese government has affirmed that $29 million from its budget for post-earthquake and tsunami reconstruction is going toward extra security measures for the country's whaling fleet, angering environmental activists like Greenpeace.
Just three years after fears of an energy supply shortage, executives of the world's leading oil companies now foresee a bonanza of oil and natural gas on the horizon.
Deforestation in the Brazilian Amazon has decreased to the lowest level since record-keeping began in 1988, according to official estimates.
VICE visits the hometown of two environmental activists who were murdered in May outside their home in the Amazon.
Todd Stern talks to CNN's Robyn Curnow about the politicalization of climate change in the U.S.
CNN's Robyn Curnow reports from the 17th U.N. Climate Change Summit in Durban, South Africa.
They are the world's cultural capitals, the nerve centers of innovation and the engine rooms of economic growth, but could cities also hold the key to cutting carbon emissions long-term?
A second batch of e-mails thought to originate from the UK research unit involved in the "Climategate" controversy in 2009 has been posted on the Internet.
Last summer a Halliburton executive did the unthinkable: He took a big ol' swig of hydraulic fracturing fluid.
An independent study of global temperature records has reaffirmed previous conclusions by climate scientists that global warming is real.
Gov. Rick Perry touted part of his plan to boost the economy at Tuesday night's Republican presidential debate in Las Vegas, Nevada, saying his energy strategy would create 1.2 million jobs. Last week, Perry said his plan would focus on tapping unexplored domestic sources for oil and gas. To do this, he said, regulations on oil and gas producers would need to be changed. Fewer rules would free up drilling in Alaska and the Gulf of Mexico, and expand clean-coal technology resources, he said.
Climate change is shrinking many plant and animal species and is likely to have a negative impact on human nutrition in the future, according to a new study.
Crews sprayed foam Wednesday to extinguish pockets of fire remaining at a Texas chemical plant two days after a massive blaze sent bright flames and thick plumes of smoke high into the sky.
Video shows a number of explosions going off in the middle of a fast-moving fire at a chemical manufacturing plant.
Japan says it will hunt whales in the Southern Ocean this winter and will send a Fisheries Agency ship to guard its whalers against promised intervention by a conservation group.
The subcommittee created earlier this year by President Obama to study shale gas drilling is expected to produce a final report before Christmas. The subcommittee will recommend ways that regulators and the industry can reduce the environmental impact of fracking.
Global energy use is expected to jump 53% by 2035, largely driven by strong demand from places like India and China, according to a report Monday.
One couple is struggling to determine why their home smells like natural gas and why the tap water ignites. WDTV reports
Unlike in previous jobs speeches, where he's been a cheerleader for clean energy and a green economy, President Obama didn't say the word "green" once in his address to a joint session of Congress on Thursday night. That seems to fit the mood of the country, but in fact, Obama is missing a stimulus program in every American gas tank.
With job creation taking center stage in American politics, the oil industry Wednesday made a pitch for drilling more widely. With looser restrictions, the industry says it could deliver 1.4 million new jobs, boost tax rolls by $800 billion, and increase domestic energy production almost 50%.
Let's take a little quiz. Which piece of home technology do you think uses the most electricity?
A few years ago I came across a newspaper article about illegal human trafficking into the EU.
It was the winter of 2006, and EOG Resources executive vice president Kurt Doerr had to be wondering what the heck he was doing prospecting for oil in the frigid central plains of North Dakota. Sure, wildcatters had been pumping modest amounts of crude out there for decades. However, nobody had ever found a true gusher, and the timing seemed odd given that EOG's core business -- drilling for natural gas, not oil -- was absolutely booming. EOG's net income had just doubled, natural-gas prices were fresh off all-time highs, and cutting-edge technologies were opening up vast new gas fields like Barnett Shale in Texas.
For owners of older office buildings, the promise of smaller energy bills is a big enticement, but the way to better energy systems is a big mystery. And it's this confusion that's got Steve Gossett working hard to become the overwhelmed landlord's best friend.
NASCAR is one of the most popular sports in America, but stock car racing is probably not the first thing you think of when it comes to protecting the environment.
In a surprise move, New York state is likely to lift its ban on hydraulic fracturing, the controversial process used to extract natural gas.
Big energy company executives and government researchers are firing back at a recent New York Times story suggesting the recent boom in natural gas production from shale rock is unsustainable and perhaps fraudulent.
When Maryland Governor Martin O'Malley issued an executive order banning fracking earlier this month, the state joined the ranks of New York, Quebec, Germany, France and South Africa to halt the controversial technique for extracting natural gas from shale rock.
Jack Gerard has pretty much been in crisis mode since taking over as president and CEO of the American Petroleum Institute in November 2008. Shortly after he arrived at the powerful oil-industry lobbying group, President Obama and a wave of Democrats swept into office, promising to fund alternative energy sources and take action on climate change. Last year the BP disaster poured more than 200 million gallons of oil into the Gulf of Mexico, and Gerard spent the summer prepping his members for more than 50 congressional hearings and eight separate investigations related to the spill and its aftermath. Then, in mid-May, executives from five oil companies appeared before a committee of the U.S. Senate and defended their earnings, which could hit record highs in 2011. "Don't punish our industry for doing its job well," Chevron CEO John Watson said. The performance was, by all accounts, a public relations disaster.
The Supreme Court on Monday unanimously tossed out a massive lawsuit brought by several states against private power companies whose greenhouse-gas emissions are accused of presenting a "public nuisance."
A new study from Duke University found potentially explosive levels of methane in drinking water supplies located close to natural gas wells.
The Supreme Court appeared reluctant Tuesday to allow a massive lawsuit by several states to proceed against private power companies whose greenhouse-gas emissions are accused of presenting a "public nuisance."
The Environmental Protection Agency on Thursday said it had reached a settlement with the Tennessee Valley Authority to resolve alleged violations of the Clean Air Act at 11 of its coal-fired power plants in three states.
As the mother of a 10-month-old daughter, I love watching her figure out new things, be it crawling or giving a high-five. I often wonder which of my personality traits little Hazel will have, and I hope that just like her father and me, she will be a lover and a defender of our environment.
Fish is good for you, but beware of mercury in some larger species. HLN's Christi Paul reports.
The oil and gas industry is reeling from attacks on what it considers one of its most important technologies -- fracking.
A year ago, the worst environmental disaster in U.S. history began on April 20 -- which, ironically, also marked Earth Day.
The Environmental Protection Agency proposed new national guidelines on Wednesday for mercury and air toxics released from power plants.
The pace at which the Greenland and Antarctic ice sheets are melting is "accelerating rapidly" and raising the global sea level, according to findings of a study financed by NASA and published Tuesday.
On the 40th anniversary of Earth Day, CNN iReporters share their visions for the world they want to live in.
William Moomaw received an unusual request on the morning of April 22, 1970.
In the grasslands of western North Dakota, one of the country's richest oil men is using a controversial gas drilling technology to develop what could be the biggest domestic oil discovery in the last 40 years.
When "GasLand," a documentary which details the environmental impact of a process called "fracking," came out, it created a public relations nightmare for the natural gas industry.
Japan cancels its winter whale hunt, blaming Sea Shepherd activists. CNN's Kyung Lah reports.
Japan has canceled the rest of its winter whaling season, with a top official reasoning that environmentalists' obstructive efforts made it dangerous for whalers to stay on the high seas.
Two major droughts in Brazil's Amazon region in the last six years threaten to undermine its role as the planet's most important carbon sink and a vital brake on climate change, according to new research.
Pres. Obama visits Penn State University to announce an initative to create more energy efficient buildings.
President Barack Obama plugged his plans to boost energy conservation research Thursday during a visit to Pennsylvania, arguing that green technology will leave more green in Americans' wallets.
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