Vehicles incorporating only the simplest of the engine improvements that methanol makes feasible would still contribute to an immediate lessening of urban air pollution.

仅采用甲醇所能实现的最简单的发动机改进措施的车辆，仍将有助于立即减少城市空气污染。

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Neira agrees in the report that "urban air pollution continues to rise at an alarming rate" and severely affects human health.

内拉同意报告中所说的“城市空气污染继续以惊人的速度上升”并且严重影响人类健康。

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Driving in this way increases fuel consumption by 40%, which means spending money needlessly and aggravating urban air pollution.

这样开车的话会提高40%的油耗量，也就意味着要多花不必要的钱而且加重城市的污染。

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Renowden says that more sustainable solutions are needed in the fight against urban air pollution.

CNN: Smog-eating tiles gobble up air pollution

This project makes use for the first time of high resolution simulations from a state-of-the-art regional atmospheric chemistry model to capture both urban and regional scale air pollution features.

UNESCO: 2015 For Women In Science Fellows

The same boom has brought drilling rigs, and the fears of air and water pollution that accompany them, into densely-populated urban areas.

WSJ: As energy boom nears cities, a backlash grows