Chemistry and Fate of Simazine.- Ethanol Production: Energy, Economic, and Environmental Losses.- Arsenic Behaviour from Groundwater and Soil to Crops: Impacts on Agriculture and Food Safety.- Health Effects of Arsenic, Fluorine, and Selenium from Indoor Burning of Chinese Coal.- Mercury Content of Hair in Different Populations Relative to Fish Consumption.- Toxicology of 1,3-Butadiene, Chloroprene, and Isoprene.