It's the bird's fault

Did pigeon dung cause the Minneapolis bridge diaster?

And it's not just bridges that are at danger: so are hydroelectric dams..

And did you hear that California scientists put GPS systems sensors and cameras around the necks of pigeons to monitor pollution?

Dave Barry commented:

WHY WE LOVE SCIENTISTS

Only they could think up a scheme whereby we fight pollution using a critter whose primary environmental activity is pooping all over the environment.