There are a couple of podcasts on them although I have not listened myself, so I can't comment on the content. Here's the link from H20 casts .

Sadly it's very easy for many to get tunnel vision on the "big" topic of the Oceans and not even pay attention the waterways in their own backyards. I know that is very true here in San Diego. We have few lakes that are continually having issues, but not many people use or care about them. I kayak one regularly and it is sad to see how poorly it is managed. Interesting to see that the Great Lakes make up 18% of the world's available surface fresh water.