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Yale's William Nordhaus has been running the numbers on Earth's climate troubles. He says charging a fair price for any dumping of carbon dioxide into the air is a cost-effective solution. But at least half the planet must cooperate, his math suggests, or it will be all pain, no gain.

In 2010, U.S.-born workers lost more than 1 million jobs while foreign-born workers gained more than a half-million nationwide. Experts in Phoenix say foreign-born people are more likely to get employed faster because they are more willing to take any job, at any pay. Researchers say the trend could change the national workforce long-term.

In March, the Myanmar military installed a new government that says it's sincere about reforming its repressive rule. It's loosened media restrictions and suspended work on a controversial dam. But skeptics fear that the changes are merely a way to placate the people and preserve the status quo.

A controversial self-defense statute appears to produce more killings, according to a new study. Advocates for the law say it's working as designed. But researchers have different explanations about what might be happening.

A controversial self-defense statute appears to produce more killings, according to a new study. Advocates for the law say it's working as designed. But researchers have different explanations about what might be happening.

For decades, China's Communist Party has declared that corruption threatens its survival. But a state-run paper recently argued that corruption couldn't be stamped out, so it should be contained to acceptable levels.

As the world's population tops 7 billion people, population experts are worried about inevitable increases in cars, computers, bigger homes and a drain on resources. In an effort to combat this, one California company is producing small, energy-efficient homes — some as tiny as 300 square feet.

As the world's population tops 7 billion people, population experts are worried about inevitable increases in cars, computers, bigger homes and a drain on resources. In an effort to combat this, one California company is producing small, energy-efficient homes — some as tiny as 300 square feet.

At the heart of the Republican plan is a proposal to give everybody in the program a subsidy to buy private health insurance. Its supporters say it would reduce health care spending. But critics contend it allows the government to spend less on Medicare by making patients pay more — potentially a lot more.

How Fannie Mae and Freddie Mac used ferocious lobbying and implicit government backing to grow rich and powerful.