Food, sports, game shows, history, travel, animals. These may sound like trivia night categories at the local pub, but their common denominator lies in the fact that each has its own TV channel. On each, you will find nothing but programs related to their single-minded titles and they represent the kinds of topics we (apparently) demand 24-hour access to. So it may say something about the traction of the environmental movement that Discovery recently launched Planet Green, a network devoted to living the eco life.

When he's not playing the fussy, pretty boy actor on the HBO series Entourage,* Adrian Grenier shares his activist side in Planet Green's Alter Eco. A fair amount of the channel's lineup is dominated by fluff, including the oh-so-clever G Word, tracking "everything hot, cool, and green" and Hollywood Green, hosted by Maria Menounos of Access Hollywood fame.

But those looking for a little meat with their greens shouldn't despair. Mean Green Machines profiles the best in carbon-lite transportation and should slake the thirst of tech-junkies. Meanwhile, Renovation Nation doles sustainable home improvement tips with the help of This Old House alumn Steve Thomas. Maybe the geekiest of the bunch is Wrecklamation, which follows demolition auctioneer Jodi Murphy as she saves and sells recyclable leftovers from bulldozer-bound houses.

The channel is a smattering of D-listers like Annabelle Gurwitch, Ed Begley Jr., Tom Bergeron, and Bill Nye the Science Guy. But is there such a thing as too much Tom Bergeron?

My pick for break-out hit is the reality show Greensburg, chronicling the efforts of Greensburg, Kansas residents as they rebuild their town green after an F-5 tornado destroyed their town. Think Extreme Makeover: Eco-Home Edition.

In all, it isn't too surprising that Planet Green's programming is a reflection of the broader television universe. It includes a number of reality shows, some informative and interesting content, and some, let's say, crap. Our attitudes may be changing, but TV isn't.


* Seriously, HBO, when's it coming back?