Indoor air pollution can come from a variety of sources, including outdoor air pollution that seeps in, building materials and furnishings that release harmful chemicals, and activities such as cooking, cleaning, and smoking.

Ozone is not a common indoor air pollutant, as it is primarily found outdoors. Carbon monoxide, nitrogen dioxide, and radon are all common indoor air pollutants.

To effectively reduce indoor air pollution, it is important to take a comprehensive approach that includes opening windows and doors to increase ventilation, using an air purifier to remove harmful particles, and reducing the use of harmful chemicals in the home.

Indoor air pollution can have a range of health effects, including asthma and respiratory problems, heart disease and stroke, and cancer.

The recommended level of indoor humidity is 40-50%. This range helps to prevent the growth of mold and mildew, and it is also comfortable for most people.

In developing countries, cooking with solid fuels, tobacco smoke, and building materials and furnishings are all common sources of indoor air pollution.

In urban areas, outdoor air pollution comes from a variety of sources, including vehicle emissions, industrial emissions, and power plants.

Particulate matter, ground-level ozone, and nitrogen dioxide are all common outdoor air pollutants.

To effectively reduce outdoor air pollution, it is important to take a comprehensive approach that includes reducing the use of fossil fuels, improving energy efficiency, and planting trees.

Outdoor air pollution can have a range of health effects, including asthma and respiratory problems, heart disease and stroke, and cancer.

Deposition, diffusion, and advection are all processes by which air pollutants are removed from the atmosphere.

Wet deposition and dry deposition are both types of deposition.

Advection is the process by which air pollutants are transported from one place to another.

Molecular diffusion and eddy diffusion are both types of diffusion.

Chemical transformation, physical transformation, and biological transformation are all processes by which air pollutants are transformed into different chemical species.