The laws of unintended consequences. Banning plastic bags in San Diego led to a Hepatitis A outbreak. https://www.sandiegoreader.com/news/2017/sep/08/stringer

The laws of unintended consequences. Banning plastic bags in San Diego led to a Hepatitis A outbreak. https://www.sandiegoreader.com/news/2017/sep/08/stringers-plastic-bag-ban-led-hep-health-crisis/ https://www.sandiegoreader.com/news/2017/sep/08/stringers-pl... 2nd and 3rd order effects are not so easy to anticipate.