environmental impacts

Many scientists rank biodiversity loss very high on their list of urgent global concerns. Chemical contaminants have long been understood as an important driver, but empirical evidence on a large scale has been sparse.

A new study published in the Proceedings of the National Academy of Sciences provides compelling data to fill this gap. Researchers found that biodiversity dropped in pesticide-laden streams in three countries: Germany, France and Australia.

Good news for public health and water quality from Minnesota this week. By June of this year, state agencies and institutions will no longer be buying soaps and cleaning products containing the pesticide triclosan.

Governor Mark Dayton made the shift with an executive order signed Monday. The new policy — the first of its kind in the country — comes in response to a combination of strong science and public concern about the chemical's prevalence and harms.

Minnesota lakes contains triclosan, say researchers. An anti-bacterial pesticide found in soap, toothpaste and many other products, triclosan is currently being (slowly) evaluated by both EPA and FDA. Meanwhile, many companies have already pulled it from their list of ingredients in response to concerns about the chemical's health and environmental harms.

University of Minnesota scientists analyzed sediment from eight lakes to understand trends in contaminant levels over time. They found that levels of triclosan and its byproducts have gone up steadily since the chemical entered the market in the 1970s.

Dupont's new systemic herbicides, designed to keep turf grass free of troublesome weeds, seem to pose little direct danger to human health. But it turns out they do kill trees.

After receiving more than 7,000 reports of damaged or killed trees in states throughout the midwest, last week EPA ordered Dupont to immediately "halt the sale, use or distribution" of the company's herbicide Imprelis.