I hate to keep citing the Times but the fact is that they are so on the ball when it comes to sustainable agriculture. A really solid story ran last week about the actual cost of shipping our food to and fro. The piece explores the implications of catching fish in Norway, sending them to China to be filetted, and then flying them back to Norway to be sold, for example. A more in depth piece examining how exactly food miles are racked up and what implications they might have (or not) ran in the New Yorker last month.
Apparently, they are using mushrooms to soak up dioxin leached from a lumber mill in Fort Bragg, CA. This story bears an uncanny resemblance to the plot of one of Hayao Miyazaki's first films, Kaze no tani no Naushi.