The correct answer is: A. tropospheric ozone.
Ozone is a molecule made up of three oxygen atoms. It is found in two layers of the Earth’s atmosphere: the stratosphere and the troposphere. Stratospheric ozone is beneficial because it absorbs harmful ultraviolet radiation from the sun. Tropospheric ozone, on the other hand, is harmful because it can cause respiratory problems in humans and other animals.
Tropospheric ozone is formed when pollutants from cars, factories, and other sources react with sunlight. It is most common in urban areas, where there is a lot of pollution. Tropospheric ozone can also be transported long distances by the wind.
The main health effects of tropospheric ozone are respiratory problems, such as asthma, bronchitis, and pneumonia. It can also cause eye irritation, headaches, and nausea. Tropospheric ozone can also damage plants and crops.
There are a number of things that can be done to reduce tropospheric ozone levels. These include:
- Reducing emissions of pollutants that contribute to ozone formation
- Planting trees and other vegetation, which can help to absorb pollutants
- Increasing public awareness of the dangers of tropospheric ozone
Tropospheric ozone is a serious problem that can have a significant impact on human health and the environment. It is important to take steps to reduce tropospheric ozone levels.
The other options are incorrect because:
- Stratospheric ozone is found in the stratosphere, which is the layer of the atmosphere above the troposphere. Stratospheric ozone is beneficial because it absorbs harmful ultraviolet radiation from the sun.
- Ionospheric ozone is found in the ionosphere, which is the layer of the atmosphere above the stratosphere. The ionosphere is important for radio communications.
- Exospheric ozone is found in the exosphere, which is the outermost layer of the atmosphere. The exosphere is very thin and does not contain much ozone.