The attached news article was penned a year and a half after the end of the war and it concerns the steps various industrial cities were taking to limit the amount of pollutants that factories belched into the air daily. On a similar note: a year after this article appeared, the Republican-lead Congress would pass an important piece of legislation titled the Federal Water Pollution Control Act.
2013 marked the first time that the industrial powerhouse of China finally recognized that air pollution in the Beijing area exists and it is a problem. China regularly emits the lion's share of green house gasses (a whopping 23.5%).
Click here to read a 1951 article about America's polluted rivers.
Below is a wartime article from The Los Angeles Times on the subject.