Carbon emissions

Reports over the past couple years have suggested sky-high U.S. carbon-dioxide emissions have been falling, but what about the global energy picture? A new report suggests its nothing to write home about.

The official news agency in China is reporting that the government will tax carbon emissions.

Europe has the largest market for carbon permits in the world. The idea is, the more a company has to pay for permits to pollute, the greater incentive it has to reduce pollution. But the economic slowdown has greatly reduced the cost of permits.

As the Kyoto Protocol nears its expiry, leaders from around the world will come together in for the United Nations yearly climate talks to discuss a new global deal to limit greenhouse gas emissions.

It's official: Companies must now purchase permits to emit excess levels of carbon dioxide and other greenhouse gases in the state of California.

Six years after enacting its own law to fight global warming, California conducts its first auction of carbon permits. Companies that give off large amounts of carbon dioxide will need permits to cover the emissions.

Global warming didn't get even a mention in the three presidential debates, but a new study says the U.S. is on track to meet its pledge to reduce emissions by one-sixth. A major reason: the power of federal regulation.

Today a 9th Circuit court in San Francisco hears arguments on the legality of California's, first in the nation, low carbon regulation for transport fuel. The case may determine whether California becomes the U.S. leader in climate litigation.

Shipping across the ice-free Arctic appears closer than ever. The new route will save fuel, but bring emissions and soot directly to the Arctic -- possibly accelerating the ice melt.

A hint of optimism about climate change.