There’s no sugar coating to the film, nor a succinct lesson at the end. But it’s important medicine at a time when public ...

DDT is an insecticide that can pass up the food chain from insects to small birds, and then from the small birds to birds of prey, like hawks. It can accumulate in the birds of prey, giving them a ...

When these are in turn eaten by birds and other animals, DDT begins to accumulate within the food chain, which means that the top predators are affected by the highest toxin concentrations.

In addition, DDT bioaccumulated up the food chain to toxic levels in apex species like raptors. It weakened the eggshells to the point where brooding mothers crushed their eggs. Bald eagles were ...