Foreclosures nearly double from year ago: report

Another subprime-mortgage-meltdown-sized risk could be looming for investors: global warming.

That alarm was sounded at an investor summit at the United Nations headquarters in New York, at which 480 investors, pension fund leaders and corporate executives from around the globe were warned that the vast majority of companies are ill-prepared for the Earth's changing climate.

Many oil producers, utilities and manufacturing plants have yet to factor in the added expense if the United States -- as is expected in the next few years -- imposes caps on carbon-dioxide emissions. Similarly, many companies with big real-estate holdings in U.S. coastal regions haven't calculated their exposure to increased tropical storms and rising seas.

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