WHO Class 2B Carcinogen classification and "stroll down memory lane"

Shaun Kranish 9 years ago updated 8 years ago 5
Date: May 31, 2011 Lyon, France

The WHO/International Agency for Research on Cancer (IARC) has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group 2B) based on increase risk for glioma, a malignant type of brain cancer associated with wireless phone use.

Stroll down memory lane
A page or two in the school WiFi book should be dedicated to reminding readers about past human misjudgments - things that affected health (such as "cigarettes are good for you" - "more doctors smoke Camels than anything else" and other examples of chemical/radiation exposure that caused real harm - like lead paint)
Does anyone have ideas on historical examples of humanities foolishness with unsafe technology/pollution? Good examples of what is common knowledge today, when we look back and say "how could they not know?"

1) Tobacco
Asbestos for fire suppression, lead for pipes (ancient Rome), DDT for pesticide
Cow’s Milk, does a body good? Not so healthy after all.
Less so today, but aerosols were big, probably contributed to significant ozone depletion in the 20th century.
And mercury and lead!!