I don't think I've blogged this site before, but Earthwatch Radio is an excellent resource for environmental news. It can be a little ecology-centric, but we have to understand how phenomena like global warming and urban sprawl affect wildlife and ecosystems. The really nice thing about the site is that it is available in several formats. It is all on the web for browsing, which you can get to by the above link. The stories are also available on the radio, which I have never listened to, but is neat. They also have short podcasts, which is how I became aware of Earthwatch Radio. That means you can download mp3s of the shows (which are quite short, usually about 2 minutes) and listen to them at your leisure, like on the bus to or from work. Podcasting essentially requires an RSS feed (see Wikipedia) to keep you updated, but also allows RSS readers (like Firefox) to check on updates, making browsing even easier.
Okay, so my rambling aside, there are two points to this post:
1. Earthwatch Radio is kind of interesting, and you might want to check it out.
2. Podcasting is also kind of interesting, and I recommend checking out this phenomenon before you fall too far behind the curve.