Is Ethanol Green Enough?

This week, California regulators are expected to take the next big step in the state's fight against climate change. The Air Resources Board is likely to approve new regulations for the fuel we put in our cars and trucks. The rules promise a big cut in greenhouse gas emissions, but the ethanol industry -- which promotes itself as making cleaner, more Earth-friendly fuels -- is furious with the proposed plan. Reporter: Marjorie Sun

• More: The Battle Over Biomass
• More: Proposal for the Low Carbon Fuel Standard [pdf]
• More: Tracking the program's progress and a the "lifecycle analysis" studies of fuels, including corn ethanol.
• More: Photo Slideshow

Examining Exit Exams

California students must pass a high school exit exam to graduate. A new study from Stanford says that requirement, which began with the class of 2006, has made it harder for girls and students of color to get a diploma. Reporter: Sasha Khokha