If the petrol used in motor vehicles were lead-free, then it would be possible to filter exhaust fumes which are a major cause of pollution.
如果机动车使用的汽油是无铅的,那么,我们将有可能过滤掉那些引起污染的废气。
Microbiological remediation technology has been taken as an important and effective way to remediate petroleum-contaminated soil for its low-cost, high-efficiency, safty and free additional pollution.
微生物修复技术以其经济、高效、安全、无二次污染等优点,已成为治理石油污染土壤的一项重要、有效的技术手段。
Not so long ago, chemical engineers discovered how to use titanium dioxide to keep buildings free of discoloring pollution.
不久前,化学工程师发现了如何用二氧化钛来防止建筑物的脱色性污染。
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