a beekeeper has set up six apiaries. it's used to test for pollution. really?l substances. scientists say they've gathered valuable information about the condition of air, but there's an added benefit that they produce high-quality honey that's presented to visitors at the airport. who knew? i didn't. that's tonight's "optional viewing." >>> time for "the final call." the last word from the options pit. scott. >> check out this week's web extra. >> dan. >> netflix designed risk bets. >> looks like our time has expired. check out our website. see you back here next friday. "mad money" is up next. program for the shark steam & spray mop is brought to you by euro-pro. >> i've been using the shark steam mop for years to clean and sanitize my wood and hard floors. >> i've always thought that to get tough cleaning jobs done right, you need a strong chemical cleaner. >> i do wish i had more help with tougher, greasy, stuck-on messes. >> i'd love to be able to sanitize all my wood and hard floors without harsh chemicals. >> both: wouldn't it be great if -- >> hey. shar