Ships and boats could be polluting the air as much as cars and lorries, shows a new study conducted by researchers from the University of Delaware, usa. During their study, the researchers found that marine vessels emit twice the amount of nitrogen oxides than was previously estimated. This suggests that waterways should be included in air pollution audits that have so far just focussed on industry and road traffic. "For most part, these marine traffic emissions have been missing," agrees Brian Lamb from the Washington State University, usa.
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