Sales of hybrid cars almost doubled last year, according to one study released last Monday. Toyota's Prius dominates the U.S. market, accounting for roughly 65 percent of hybrid purchases. Some say higher gas prices are pushing drivers to consider cars with better gas mileage. But what would it take for you to get out of your car completely? Marketplace reporter Jeff Tyler hit the road to find out.

In our latest installment of Educating Rico, our protagonist plans a summer vacation. But before he packs his bags, and a calculator, he decides to get schooled on foreign exchange rates.

Soaring crude oil costs have sweetened profits at major oil companies, but have left other businesses and consumers troubled. This week, President Bush called on Congress to pass his energy bill, which he claims will increase supplies of oil and energy. But can more refineries really curb rising oil prices? Author Stephen Leeb offers a different scenario.