Eventually, the steel plant spent more than one billion dollars to make a very deep cut in its air emissions, a contribution to the significant improvement of air quality in a vast airshed, which includes my city, Beijing.

最终，该钢厂花费超过 10 亿美元大幅减少了空气排放，为显着改善包括我的城市北京在内的广大空气区的空气质量做出了贡献。