Except for eye irritation from the dust, the men had no real injuries.

CNN: STORY HIGHLIGHTS

Secondhand smoke exposure causes eye irritation, asthma and other acute respiratory diseases and is thought to be a cause of infant crib death.

CNN: Is secondhand smoke really that risky?

Hundreds of people experienced nausea, eye irritation and other symptoms.

BBC: Chinese pesticide cloud alarms Buenos Aires

Enormous quantities of air pollution from burning forests led to a dramatic rise in the number of cases of eye irritation, respiratory illness and cardiovascular disease -- examples of the unexpected public health surprises which become more likely in a warming world.

CNN: Global warming may harm human health

Health experts say ingesting melamine can lead to kidney stones, urinary tract ulcers, and eye and skin irritation.

CNN: Almost 13,000 Chinese children sickened by tainted milk

The U.S. Environmental Protection Agency says the chemical can cause eye, nose, and throat irritation.

CNN: Pollution, Internet, doping dominate Olympics lead-up