It reduces your ability to exercise and is dangerous for people with chronic heart disease. It can cause nausea, dizziness, headaches, and when it's very concentrated, even death. When carbon monoxide reaches unhealthy levels, people with heart disease are most at risk. Primarily from motor vehicles, but also from incomplete burning of any fuel. Lead Causes damage to the brain and other parts of the body's nervous system.
Children are most susceptible to the effects of lead.
Mostly from a few industrial facilities, but also from the sanding or wearing away of old lead-based paint. Nitrogen dioxide Irritates the nose and throat, especially in people with asthma. Appears to increase susceptibility to respiratory infections. When nitrogen dioxide reaches unhealthy levels, children and people with respiratory disease are most at risk. Power plants, large industrial facilities, and motor vehicles.