NBC's Green Week pitches cars, celebs, and good behavior

Today NBC kicks off its second annual "Green Week," using its airwaves to send enviro-messages and filling up a diverting website with tips, tricks, and clips.

Today Show viewers certainly noticed this morning that Matt, Meredith, Ann, and Al have been dispatched to "the ends of the Earth" to report on how climate change is endangering the oceans and our water supplies. They've assured us that they've bought carbon offsets to cover those tens of thousands of air miles. This morning Meredith seemed painfully jet-lagged, but Al was positively giddy as he reported from Iceland's spectacular Gullfoss waterfall and explained how the glacial runoff that feeds it is threatened.

Watch for other NBC shows to sneak in green tips throughout the week. Online, it's car nut Jay Leno who gets the prime real estate, with seven videos from his famous garage highlighting some of his alternative fuel ideas. Among the tips provided at the site are the usual "drink draft beer," have a clothes-swapping party, and "bring your own bag," but you may learn something new -- and you're invited to provide your own tips -- at the discussion board.