For years, a chemical plant in the Chinese village of Qiugang had polluted the river, poisoned the drinking water, and fouled the air — until residents decided to take a stand. The Warriors of Qiugang, a Yale Environment 360 video co-produced by Ruby Yang and Thomas Lennon, tells the story of the villagers’ determined efforts to stop the pollution.

Researchers disagree about what the economic costs of climate change will be over the coming decades. But the answer to that question is fundamental in deciding how urgent it is to take action to reduce emissions.

One of the many casualties of the recent U.S. elections was Congressman Rick Boucher, a Virginia Democrat who played a key role in passage of cap-and-trade legislation by the House of Representatives. In an interview with Yale Environment 360, Boucher discusses the bitter failure of the Senate to pass a climate bill and future prospects for tackling global warming.

Norway and other nations have vowed to invest billions of dollars to help preserve Indonesia’s remaining tropical forests. But can foreign involvement stem the tide of graft and uncontrolled logging that has steadily decimated one of the world’s largest areas of rainforest?

The Chinese government has begun to make environmental records available to the public, empowering green groups and citizens as they try to force factories — and the Western companies they supply — to comply with the law.

The Cancun conference is being credited with keeping international climate talks alive. But the real potential for bringing emissions under control may lie in a Plan B, with nations acting on their own in moving toward a low-carbon economy.

To offset their own carbon emissions, European companies have been overpaying China to incinerate a powerful greenhouse gas known as hfc 23. And in a bizarre twist, those payments have spurred the manufacture of a harmful refrigerant that is being smuggled into the U.S. and used illegally.

The idea of creating biochar by burning organic waste in oxygen-free chambers — and then burying it — is being touted as a way to cool the planet. But while it already is being produced on a small scale, biochar’s proponents and detractors are sharply divided over whether it can help slow global warming.

Long a proven technology in Europe, green roofs are becoming increasingly common in U.S. cities, with major initiatives in Chicago, Portland, and Washington, D.C. While initially more expensive than standard coverings, green roofs offer some major environmental — and economic — benefits.

The push to promote sustainable palm oil is turning into a test case for green consumerism. The outcome could help determine the future of the rainforests of Asia and Africa — and whether consumer pressure can really sway corporate giants.

The synthetic chemical, BPA — found in everything from plastic bottles to cash register receipts — is a potent, estrogen-mimicking compound. In an interview with Yale Environment 360, biologist Frederick vom Saal harshly criticizes U.S. corporations and government regulators for covering up — or ignoring — the many health risks of BPA.

While the collapse of climate legislation in Congress was a setback for some green businesses, many others are moving ahead with projects to develop renewable energy. One major reason: The clean-tech sector is rapidly growing worldwide, and U.S. companies don’t want to be left behind.

As the economies of China and other Asian nations have boomed, demand for shark fins — a prized delicacy — has soared, leading to severe overfishing of many shark species. In an interview with Yale Environment 360, shark conservationist Sonja Fordham talks about the battle to save one of the world’s most magnificent fish.

In the past century, populations of wild tigers have plummeted from 100,000 to 3,500. Now the World Bank and conservationists have launched an eleventh-hour effort to save this great predator, focusing on reining in the black market for tiger parts and ending the destruction of tiger habitat.

With an aggressive campaign focused on advertising, lobbying, and political contributions, America’s coal industry has succeeded in beating back a challenge from environmentalists and clean-energy advocates. The dirty truth is that Big Coal is more powerful today than ever.

Britain’s new government is proposing radically new energy policies, with a “Green Deal” that would retrofit the country’s woefully energy-inefficient housing stock. In an interview with Yale Environment 360, UK Energy and Climate Minister Greg Barker talks about why an overhaul of the approach to energy is essential for the nation’s future.

With large swaths of forest destroyed by wartime defoliants, and even larger areas lost to post-war logging, Vietnam has set an ambitious goal for regenerating its woodlands. But proponents of reintroducing native tree species face resistance from a timber industry that favors fast-growing exotics like acacia.

The number of salmon in the Pacific Ocean is twice what it was 50 years ago. But there is a downside to this bounty, as growing numbers of hatchery-produced salmon are flooding the Pacific and making it hard for threatened wild salmon species to find enough food to survive.

Amid China’s seemingly boundless emissions of industrial pollutants, there are signs of hope. Discharges of sulfur dioxide, which causes acid rain, have actually decreased, offering some evidence that China is starting to establish a culture of pollution monitoring and control.

By year’s end, regulators are expected to approve a host of solar energy projects in California that could eventually produce as much electricity as several nuclear plants. In an interview with Yale Environment 360, John Woolard, the CEO of the company that has begun construction on the world’s largest solar-thermal project, discusses the promise — and challenges — of this green energy boom.