HOLMES: Well, the U.S. Environmental Protection Agency is stepping up its monitoring of radiation coming from Japan. Trace levels of radiation have been found in milk produced by cows on the West Coast of the U.S. but the government says the amount is too low to trigger any health concerns. Our senior medical correspondent Elizabeth Cohen puts this in perspective for us.</s>ELIZABETH COHEN, CNN SENIOR MEDICAL CORRESPONDENT (on camera): You know, there's no question. The U.S. government has found radiation in milk, but in really teeny, tiny amounts. For example, we're told that you would have to drink 1,000 liters of milk to get the same amount of radiation that you get in a chest x-ray. Here's another way to look at it, if you drink a pint of milk, you're getting less radiation than you would if you were sitting on an airplane for five hours. So these amounts are really, really small. U.S. authorities are really quite sure that this is radiation from Japan and not another source, because they can actually match up those isotopes and see that they're the same. So what happens is the radiation basically floats from Japan to the United States and then particles of radiation fall on to the grass and then cows eat that grass and then, well, the radiation ends up in the milk. In Japan, they found radiation not just in milk, but also in beef. Now that hasn't happened yet in the United States. Back to you.</s>HOLMES: All right. Well, you know all those moments you and your family spend watching television? Well, now your TV is spending all that time watching you back. It's 22 minutes past the hour.
Government Continues to Monitor Radiation Levels on U.S. West Coast