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UMD-led study finds China’s SO2 emissions down 75% since 2007, India’s up 50%; India may now be the top SO2 emitter

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Illustration: Chris McLinden, Environment and Climate Change Canada. First, the researchers collected estimated emission amounts from inventories of the number of factories, power plants, automobiles and other contributors to sulfur dioxide emissions. Purple depicts the highest concentrations while white depicts the lowest.

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Satellite method provides insight into ozone-NOx-VOCs sensitivity for different locations

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Quantitative use of this indicator ratio is subject to three major uncertainties: (1) the split between NO x -limited and NO x -saturated conditions may shift in space and time, (2) the ratio of the vertically integrated column may not represent the near-surface environment, and (3) satellite products contain errors. Murray, L. Lamsal, L.

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