Tag Archives: Ringelmann Smoke Chart

June 13, 1947: California Takes First Steps to Reduce Smog

Posted on June 13, 2018 by lmharnisch

A sample card from the Ringelmann Smoke Chart. Note: This is an encore post and originally appeared in 2005 on the 1947project. Shall we talk about noir? Let’s start with the skies over Los Angeles, which are so dirty that … Continue reading →

Posted in 1947, Environment | Tagged , , , | 2 Comments