Kids are hearing a lot about being "green" these days as parents and teens grapple with questions about climate change, pollution, and the effects of globalization on the environment. Television can be a great tool for introducing kids to nature (though it doesn't take the place of real-life outdoor experiences!). TV can both inform and transport viewers to places they wouldn't otherwise see (like the rainforest or desert). For the littlest kids, an appreciation of the natural world through beautiful images and captivating animals plant the seeds of environmental awareness. As kids get older, more specific lessons about the Earth, the challenges it faces in this modern age, and how people can work to improve the environment are timely and age appropriate. Check out our editor's picks below for some of the best environmentally focused shows on TV today -- for Earth Day or any day!