Urban rail transit has the characteristics of large freight volume, fast, safety and less environmental pollution.

城市轨道交通具有运量大、速度快、安全性高和环境污染低等特点。

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Its advantages are less quantity to be treated, low cost and less environmental pollution and damage to human body.

本发明具有处理量少，简便易行，费用低的优点，减少了环境污染和对人体健康的侵害。

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The protecting gas of the present invention has the features of use convenience, low cost and less environmental pollution.

采用本发明生成的保护气体具有使用方便、成本低廉、环境污染小的特点。

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The solutions have potentially huge cascading effects: Obviously, a more pedestrian-friendly infrastructure leads to fewer cars and less environmental pollution, but it also creates more opportunities for physical activity and socialization and, therefore, healthier and happier populations.

FORBES: Can We Design Our Way to a Healthier America?

The Environmental Protection Agency consistently ranks hazardous-waste sites as less harmful to human health than radon, outdoor particulate pollution or working exposure to pesticides.

ECONOMIST: Race and the environment