Americans take so many mood-altering and addictive pills that water supplies are being contaminated. There’s a good chance that if you live in an urban area, your tap water is laced with tiny amounts of antidepressants (mostly SSRIs like Prozac and Effexor), benzodiazepines (like Klonopin, used to reduce symptoms of substance withdrawal) and anticonvulsants (like Topomax, used to treat addiction to alcohol, nicotine, food and even cocaine and crystal meth). Such are the implications of environmental studies that have been leaking out over the past decade. Whether or not this psychoactive waste has any effect on the human nervous system remains unclear, but when such pharmaceuticals are introduced into the ecosystem, the fallout for other species is demonstrable—and potentially dire. There's no mystery to the way prescription medications wind up in our tap water. Whether you flush a bottle of old pills down the toilet or, more likely, excrete the remains of a daily dose (an estimated 80% isn’t broken down in our bodies), active chemicals get recycled back into reservoirs because sewage treatment plants aren’t able to filter them out.