as soon as that pizza box gets that pizza oil on it, it becomes unrecyclable. so the cleaner materials that we can get, when you think about it, really what we're saying is, give us the cleanest material you can give us. and give us those materials that you can think about that don't muck up our work. >> and cram the pizza boxes in the regular garbage? >> unfortunately, that's where it goes. but the reality is that even at landfill we're doing things to try to recycle. we have a landfill in california where we take the methane that's produced by the waste you give us and turn that methane into liquified natural gas. it goes back into garbage truck that goes back out to pick up your waste. we call that an environmental closed loop. >> david, thank you. it's really a pleasure talking to you. >> thank you, becky. >>> next we're "on the money." kids cost a whole lot of money. here's the good news, they can help lower your tax bills. we'll walk you through how to make every dollar and every diaper count when you're filing your returns. >>> later, 'tis the season for