waste gas treatment

例句：

1. 1. The factory has to treat the waste gas before it can be released into the atmosphere.
   工厂在排放之前必须处理废气。
2. 2. The company is investing in new technologies to improve waste gas treatment efficiency.
   该公司正在投资新技术以提高废气处理效率。
3. 3. The waste gas treatment plant was designed to minimize environmental impacts.
   该废气处理厂的设计旨在最小化对环境的影响。