Study finds mercury pollution from human activities is declining / Modeling study finds mercury pollution from human activities is declining / Local dragonflies expose mercury pollution patterns / 'We have been met with a hard heart': Frustrated at lack of progress, Grassy Narrows sues governments for failing to clean up mercury pollution / Study shows climate change and mercury pollution stressed plants for millions of years / Mercury pollution at Eraring power plant rose 130% in 12 months / Global deforestation leads to more mercury pollution, finds study