Two interesting—and a bit disturbing—pieces of toxics news today.

First, several newsoutlets are reporting on a new study, coming out of UC Berkeley, showing that mixtures of several environmental contaminants (in this case, pesticides) can be far more potent than higher concentrations of a single compound.  The problem is especially bad for frog populations—which, as frog-watchers everywhere will tell you, are in particularly bad shape.

Second, there’s this new report, put together by two breast cancer groups:

As many as half of all new breast cancers may be foisted upon woman by pollutants in the environment, triggered by such items as bisphenol-A lining tin cans or radiation from early mammograms, according to a review of recent science by two breast cancer groups.

No comments here, except that, perhaps—just perhaps—the former study might help explain the latter.