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 亿美元幅减少了气排放，为显着改善包括我城市北京在内气区气质量做出了贡献。