Wal-Mart’s push to develop a sustainability index for the products it carries could prove to be a pivotal moment in the effort to make consumers aware of the environmental impacts of what they buy.

By the end of the century, New York’s climate could resemble that of present-day Raleigh, North Carolina and its harbor could easily rise by two feet or more. Faced with this prospect, the city is among the first urban centers to begin changing the way it builds its infrastructure — and the way it thinks about its future.

The U.S. can build all the wind turbines and solar arrays it wants, but until it does something about improving its outmoded electricity grid, renewable energy will never reach its potential. What we need is a new electricity transmission system, with the costs shared by all.

Stephen Kellert, a social ecologist, is a passionate advocate for the need to incorporate aspects of the natural world into our built environment. In an interview with Yale Environment 360, he explains what we can learn from cathedrals, why flowers in a hospital can heal, and how green design can boost a business’s bottom line.

For more than 40 years, scientists have dreamed of collecting the sun’s energy in space and beaming it back to Earth. Now, a host of technological advances, coupled with interest from the U.S. military, may be bringing that vision close to reality.

If a cap-and-trade bill passes Congress this year, it may include weak emissions targets and will likely need to be strengthened in the years to come. One way to guide future policy: create a Global Climate Change Index that could be used to track global warming’s impacts.

In the Yaak Valley of Montana, environmentalists have been talking to loggers, snowmobilers and other longtime opponents of wilderness protection about the future of public lands. Their accord is part of a cooperative effort that could lead to the first wilderness-area designation in the state in a quarter century.

China is on its way to becoming the world’s largest producer of renewable energy, yet it remains one of the most polluted countries on earth. A year after the Beijing Olympics, economic and political forces are combining to make China simultaneously a leader in alternative energy — and in dirty water and air.

John Holdren, the president’s top science adviser, is playing a key role in shaping the Obama administration’s strategy to combat global warming. In an interview with Yale Environment 360, Holdren discusses the prospects for achieving key breakthroughs on climate change, both in Congress and at upcoming talks in Copenhagen.

In a matter of years or decades, researchers believe, animals and plants already are adapting to life in a warmer world. Some species will be unable to change quickly enough and will go extinct, but others will evolve, as natural selection enables them to carry on in an altered environment.

Setting unattainable emissions targets is not a policy — it’s an act of wishful thinking, argues one political scientist. Instead, governments and society should focus money and attention on workable solutions for improving energy efficiency and de-carbonizing our economies.

In an interview with Yale Environment 360, John Kerry praises the carbon cap-and-trade legislation now being debated in the U.S. Senate, describes its importance to upcoming climate talks in Copenhagen, and explains how he plans to help the landmark legislation clear the Senate and become law.

As the International Whaling Commission debates whether to ban all whaling or to expand the limited hunts now underway, recent research has convinced some scientists that the world’s largest mammal should never be hunted again.

The environmental damage caused by mountaintop removal mining across Appalachia has been well documented. But scientists are now beginning to understand that the mining operations’ most lasting damage may be caused by the massive amounts of debris dumped into valley streams.

It took awhile, but the U.S. Midwest finally has recognized that the industries that once powered its economy will never return. Now leaders in the region are looking to renewable energy manufacturing and technologies as key to the heartland’s renaissance.

For years, the stumbling block for making renewable energy practical and dependable has been how to store electricity for days when the sun isn't shining and the wind isn't blowing. But new technologies suggest this goal may finally be within reach.

Marine biologist Jane Lubchenco now heads one of the U.S. government’s key agencies researching climate change — the National Oceanic and Atmospheric Administration. In an interview with Yale Environment 360, Lubchenco discusses the central role her agency is playing in understanding the twin threats of global warming and ocean acidification.

Wildlife biologists and climate scientists overwhelmingly agree that the disappearance of Arctic sea ice will lead to a sharp drop in polar bear populations. But some skeptics remain unconvinced, and they have managed to persuade the Canadian government not to take key steps to protect the animals.

A new U.S. government report paints a disturbing picture of the current and future effects of climate change and offers a glimpse of what the nation’s climate will be like by century’s end.

Tighter restrictions on mountaintop removal mining are simply not enough. Instead, a leading climate scientist argues, the Obama administration must prohibit this destructive practice, which is devastating vast stretches of Appalachia.

As carbon cap-and-trade legislation works it way through Congress, the environmental community is intensely debating whether the Waxman-Markey bill is the best possible compromise or a fatally flawed initiative. Yale Environment 360 asked 11 prominent people in the environmental and energy fields for their views on this controversial legislation.