Environmental Health News: As United Nations delegates end their mercury treaty talks today, scientists warn that ongoing emissions are more of a threat to food webs than the mercury already in the environment. At the same time, climate change is likely to alter food webs and patterns of mercury transport in places such as the Arctic, which will further complicate efforts to keep the contaminant out of people and their food. The discovery that new mercury seems to be more of a threat than old mercury could add impetus for...