Schools located near the Tijuana River Valley have suspended outdoor activities due to high levels of hydrogen sulfide in the area, a result of toxic waste coming from the river all the way from Mexico.
Researchers conducting studies in the area have also stopped their work due to the potential harm. Dr. Kim Prather, director of the Center for Aerosol Impacts on Chemistry of the Environment at UC San Diego, told researchers that she could not continue putting them "at this level of risk," according to the San Diego-Union Tribune. Prather's team, she said, has registered hydrogen sulfide levels "persistently and dramatically above the state standard."
