If people could go to work by bus or by bike instead of car or motorbike, it would be helpful in fighting against the problem of SO2.

如果人们可以乘公共汽车或骑自行车去上班，而不是乘汽车或骑摩托车，这将有助于对抗二氧化硫的问题。

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SO2 is a colourless gas with a sharp odour.

二氧化硫是一种无色气体，带有刺鼻的气味。

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It's best to consider the SO2 measurements a work in progress, emphasized Pickering.

最好认为SO2的测量处于进展之中，Pickering强调。

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And as an example, let's take sulfuryl chloride, SO2, Cl2 make it a little complicated, Cl2, right, so don't worry about these compounds.

让我们用SO2作为一个例子，这有点难度，对，还有，不要担心这些化合物。

麻省理工公开课 - 固态化学导论课程节选

So, the quick, fast, cheap fix is to put the SO2 out through tall stacks.

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Unlike SO2, CO2 wasn't a pollutant--at least not then--and the EPA had no authority to regulate it.

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The economic value of the health impacts was based on premature mortality, workdays lost, and other direct costs to the healthcare system resulting from emissions of PM2.5, NOx, and SO2.

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