Study: Many sick dolphins one year after oil spill (Update)

Dolphins living in one of the areas worst hit by the Gulf of Mexico oil spill were in bad shape a year later, with lung problems consistent with exposure to oil, according to a study assessing damage from the spill.

EPA tightens rules on pesticide linked to deaths

(AP) -- Federal officials have moved quickly to clamp down on the use of potent rodent-killing pesticides after one was linked to the deaths of two Utah girls earlier this year.

Scientists advance safety of nanotechnology

Scientists have identified for the first time a mechanism by which nanoparticles cause lung damage and have demonstrated that it can be combated by blocking the process involved, taking a step toward addressing the growing ...