General Motors announced the closure of four truck and SUV plants in the U.S., Canada and Mexico Tuesday and said it may discontinue its Hummer brand as soaring fuel prices push a broad shift in the U.S. to smaller vehicles.

Since undertaking market reforms in late 1970s, China has enjoyed an economic boom -- but the economic progress has also produced serious environmental damage and pollution problems. Margaret Warner reports on China's environmental woes and their impact on the run-up…

Apr 30

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In a smaller move than in past months, the Federal Reserve cut a key interest rate by a quarter percentage point Wednesday in what could be the last in a line of reductions aimed at boosting an economy hit hard…