An estimated 10 to 40 percent of prescription and over-the-counter medicines are not used, but how to properly dispose of these drugs depends on who you ask. Since there is no continuous national program, states — and even some cites — are instituting their own regulations, but not without complaints from the pharmaceutical industry.

High temperatures and salinity concentrations along the Texas Gulf Coast are behind a toxic red tide, fish kills, and an influx of oyster parasites. Additionally, several saltwater species have been found upstream, surviving in a typically freshwater environment and signaling a large change in these delta ecosystems.