President Obama's stimulus plan includes billions to help jump-start a new network of high-speed trains. But the future of rail is already a reality in other parts of the world, including Japan, China and as Kathleen Schalch reports, the European Union.
Biofuels have been touted as the best hope for reducing reliance on fossil fuels and limiting greenhouse gases. Now many scientists are raising doubts about that. Reporter Kathleen Schalch examines the debate over the costs and benefits of biofuels.
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