Nox is a precursor of smog ; sox contributes to particulate matter ; and pm has been shown to lead to health problems .
烟雾是氮氧化物前驱；脱硫有助于颗粒物；而分列已导致健康问题。
Thousands of years to reach the nox world ?
传到诺克斯世界,不是要几千年吗?
Apart from these general provisions , the amendments also contain a series of complex provisions relating specifically to ozone , nox , co , and particulates .
Professor boehman would like to see more research done so we can know for sure if ( and how much ) additional nox pollution is caused by the use of nitrogen-enriched gasoline .
