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Farmers in Wisconsin and many other states are increasingly embracing the practice of manure irrigation to fertilize their fields. Spraying liquefied manure on fields offers multiple environmental benefits, but for people living nearby it also constitutes an exposure pathway to potentially harmful pathogens.

Public concern over potential health risks related to oil and gas development has spurred researchers to quantify how many people live near these facilities, in what are known as proximity studies. A new study estimates how many Americans live within a mile of oil or gas development and proposes guidelines for designing future proximity studies.

Few chemical exposures occur in isolation. However, chemicals do not occur in random combinations; some mixtures are much more likely to occur than others. A tool called frequent itemset mining may help pinpoint mixtures that people most often encounter and help researchers prioritize mixtures for study.

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