It is important that we measure ozone at ground level, as high concentrations can cause health and environmental problems.
How nitrogen oxides form, their environmental and health effects, and methods to measure them.
Carbon monoxide is a gas formed when substances containing carbon (such as petrol, gas, coal and wood) are burned with an insufficient supply of air.
When sulfur dioxide combines with water, it forms sulfuric acid - the main component of acid rain. When acid rain falls, it can cause deforestation.
Air toxics are gases, particles or aerosols in the air at concentrations where their toxicity poses a hazard to human health and plant and animal life.
The occurrence, environmental and health effects, and measurement of metal air pollutants like lead, arsenic, cadmium, copper and zinc.
Airborne particles can be present at levels where they pose a hazard to human health or be deposited in amounts that cause a nuisance.
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