Study even finds trace remnants of DDT, banned 40 years ago
By Summit Voice
FRISCO — Frogs in remote Sierra Nevada backcountry ponds are contaminated with traces of pesticides, including a byproduct of DDT, which was banned more than 40 years ago, showing how long some pollutants can persist in the environment.
The chemicals are heavily used in California’s Central Valley, one of the most productive agricultural regions in the world, and transported via wind, dust and precipitation to the High Sierra. Continue reading
Filed under: agriculture, biodiversity, endangered species, Environment, national parks, water quality, wilderness | Tagged: Environment, immune system supression, Pacific Tree Frog, pesticides, pollution, Sierra Nevada, United States Geological Survey | Leave a comment »