For a year, VW officials insisted to U.S. regulators that tests on its diesel cars showing a spike in pollution levels on the road were in error.
Singapore has closed its schools after the pollution levels caused by the smoky smog enveloping the city hit dangerously high levels.
More than two years after researchers reported abnormalities in Volkswagen emissions, the automaker is engulfed in a scandal.
In a historic presentation to Congress, Pope Francis urged lawmakers to take "courageous actions" on global warming, poverty and the refugee crisis.
There is now enough human-made debris floating through space that some companies believe they can build a business around it.
Hugh Martin, CEO of Sensity Systems, explains why smart cities are a huge market in China, especially because of the country's pollution problem.
In Europe, some automakers have taped up test cars' doors and grilles to bolster their aerodynamics, the NYT reports.
Biofuels could transform the aviation industry. CNBC's Sustainable Energy takes a look how.
The fast-moving wildfires in California are threatening some of the state's most lucrative wine-producing regions and at the peak of harvest.
CNBC's "Sustainable Energy" takes a look at how wind, sunlight, tides and geothermal heat are becoming a big part of the world's energy mix.
Volkswagen has told U.S. dealers to halt sales of some 2015 diesel cars after regulators found software it designed for the affected vehicles gave false emissions data.
U.S. researchers have developed a toilet that could help transform the sanitation and waste industry.
One social enterprise is helping to transform -- and potentially save -- lives with biomass cook stoves.
At least one person has been killed, four firefighters injured and 23,000 forced to flee their homes as wildfires continue to rage
Singapore has been covered in a hazy cloud, triggered by raging forest fires in Indonesia.
Snow levels in the Sierra Nevada mountains are at their lowest point in 500 years, depriving California of much-needed water.
A U.S. appeals court cancelled EPA approval of an insecticide developed by Dow AgroSciences.
Scientists are fearing that a toxic bloom off the West Coast could last well into 2016, which would cripple fishing and tourism industries.
A company is looking to empower rural Indians by making the most of a suppertime staple: Rice.
Peder Holk Nielsen, CEO of Novozymes, says it has become tougher for renewables and biofuels to compete with fossil fuels.