Ozone (O3) is a gas molecule that can be both good and bad for our health and the environment, depending on its location in the atmosphere.
- Stratospheric ozone is located high in the upper atmosphere, forming the "ozone layer" that shields us from the sun's harmful ultraviolet (UV) rays. This "good" ozone is essential for life on Earth.
- Ground-level ozone, however, is a harmful air pollutant that forms when nitrogen oxides and volatile organic compounds react in the presence of sunlight. It's a major component of smog and can trigger a variety of health problems, especially for children, the elderly, and those with lung diseases.
The EPA (Environmental Protection Agency) considers ozone one of the six common air pollutants that are harmful to human health and the environment. While stratospheric ozone is crucial for life, ground-level ozone is a significant health concern, particularly in urban areas.
Examples:
- Good Ozone: The ozone layer in the stratosphere absorbs most of the sun's harmful UV radiation, preventing skin cancer, cataracts, and other health problems.
- Bad Ozone: Ground-level ozone can cause respiratory problems, trigger asthma attacks, and damage crops and forests.
Solutions:
- Reducing emissions from cars, power plants, and industrial sources can help decrease ground-level ozone pollution.
- Supporting policies that promote cleaner air, like vehicle emission standards and fuel-efficient technologies, is crucial.
