Again going to the link that gt gave us in his original post, I was looking at the "map" of the dead zone off our coast and it got me wondering about what seasons are the worst for ag runnoff spilling into the Pacific from the mouths of the Columbia, Willapa Bay and Grays Harbor. Most likely Fall through Spring when the rains and river flows are heaviest. This is also the time of year when the prevailing winds, which help set up the surface currents along the coast, are NOT out of the northwest, but often from the E to SE as storms approach, and turning to from the S or SW as the front hits the shore and moves inland. This would set up southerly currents (called the Davidson Current?) that move all those nutrients (fertilizer and cowshit runnoff) northward. go back to that link and look at that map of the dead zone. Looks to me like you can point the finger at agricultural runoff. If it is indeed one of the major culprits behind this particular dead zone, then by extension you might think that more fertilizer applied to the land to grow more biofuel crops will eventually result in more of the same kind of runoff, making the dead zone worse or bigger. I know the scenario I just described is pretty damn simplistic, but it crossed my mind.