Water vapor is a naturally occurring component of the atmosphere and is not considered a major air pollutant.

Particulate matter can be emitted from various sources, including motor vehicles, industrial activities, construction sites, and other human activities.

Exposure to carbon monoxide can cause various health problems, including headaches, nausea, and heart problems, but it does not improve cognitive function.

Photochemical smog is a complex mixture of pollutants, including nitrogen dioxide, ozone, peroxyacetyl nitrate, and other compounds.

Natural weathering of rocks is a natural process that does not contribute significantly to water pollution.

Exposure to lead in drinking water is primarily associated with neurological damage, particularly in children.

Fertilizers and pesticides are not considered major types of land pollution, as they are typically applied to soil and do not directly contaminate land.

Radioactive waste can be generated from various sources, including nuclear power plants, medical facilities, and industrial activities.

Increasing the use of fossil fuels would worsen air pollution, not mitigate it.

The primary goal of wastewater treatment is to remove contaminants from wastewater before it is discharged into the environment.

Expanding landfills would increase land pollution, not reduce it.

Environmental transport refers to the transfer of pollutants from one environmental medium (e.g., air, water, soil) to another.

Vitamin deficiency is not an environmental health risk, but rather a nutritional issue.

Chronic toxicity refers to the long-term effects of exposure to low levels of pollutants over an extended period of time.

Increasing deforestation would worsen environmental health, not promote it.