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International study identifies 14 key measures to reduce methane and black carbon emissions; reduction in projected global mean warming of ~0.5 °C by 2050

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Methane is both a potent greenhouse gas and an important precursor to ground-level ozone. Ozone, a key component of smog and also a greenhouse gas, damages crops and human health. In addition, they darken ice and snow, reducing their reflectivity and hastening global warming. Shindell et al., Supplementary material. Click to enlarge.

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Final session on international mercury convention this week expected to culminate in agreement; UNEP Global Mercury Assessment 2013 finds industrial source Hg emissions may be rising

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Unintentional emission sectors: Coal burning, ferrous- and non-ferrous (Au, Cu, Hg, Pb, Zn) metal production, cement production. Despite recent progress in improving the available knowledge base, the report notes, the emissions estimate still has large associated uncertainties, giving a range of 1,010-4,070 tonnes. Source: UNEP.

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