Environmental context. Wildland fire smoke and its impacts on air quality and human health are increasing globally. However, uncertainties in organic emissions from these fires hinder our understanding of downwind atmospheric photochemical processes driving the formation of hazardous air pollutants. In this study, we investigated the impact of fuel moisture content on organic species emission during the combustion of ponderosa pine needles, an important fuel source in the western United States.

Environmental context. Environmental estrogens can disrupt the normal functioning of endocrine systems, and their occurrence in drinking water sources could cause potential health risk. We investigated concentrations of four estrogens in the lakes from the Taihu Basin, and found that BPA and EE2 were elevated in some sites. However, concentrations of all four environmental estrogens were below the national standards, and caused no health threat to local population.