A California ballot initiative would require labels on foods that contain genetically engineered ingredients. Food makers and producers of genetically modified seeds say the crops are safe and labels will only frighten consumers.

California voters will decide whether genetically modified foods should be marked as such. Food-makers have fought the change, a turnabout from when genetically modified foods were first introduced.

The stalks of genetically modified corn are tough, so tough that they're puncturing tractor tires. Farmers are fighting back.

I never know when it makes sense to shell out extra money for organic foods. It's one of the reasons I started working on the story for Marketpla…