Radiation effects are easy to simulate in the lab. Just put the rat into the special oven, turn it on for a few days, weeks, or years, and then record the results. Alot more straightforward than other types of research, so I would tend to believe the experts who say that cell phones and overhead power lines are safe.

With respect to power lines disrupting smolt navigation, I thought it was MAGNETIC fields the fish were using, same as your compass. This field is quite different than the electric fields from power lines.

With respect to dams and their impact on fisheries, the Army Corp of Engineers has been keeping dam passage records for over 60 years. These records indicate that the last couple years have had more fish pass by than all other years, and these previous years include the time periods when the Snake River Dams, McNary, John Day, the Dalles, and other dams did not even exist!!!!!

What the counts do not show is what happened in the early statehood years (ie, pre 1938) when all those ugly pilings you see all up and down the Columbia had large canneries sitting on top of them.