Vehicle emissions, particularly from diesel engines, are a major source of air pollution in urban areas, contributing to high levels of particulate matter and nitrogen oxides.

Sulfur dioxide, released from the burning of fossil fuels, is a major contributor to acid rain, which can damage forests, lakes, and buildings.

Air filtration involves passing air through a filter to remove particulate matter, dust, and other pollutants.

Methane is not typically emitted by power plants, unlike carbon dioxide, sulfur dioxide, and nitrogen oxides.

Smog refers to a condition where air pollution levels are high, often caused by a combination of pollutants such as ozone, particulate matter, and nitrogen oxides.

Nitrogen oxides, particularly nitrogen dioxide, are key contributors to the formation of ground-level ozone, which can cause respiratory problems and harm vegetation.

Emission control involves using devices and technologies to reduce the release of pollutants from vehicle exhaust systems.

Natural ventilation, by itself, is not a source of indoor air pollution, but it can affect the levels of pollutants indoors.

Solar power involves harnessing the energy from sunlight to generate electricity using photovoltaic cells.

Oxygen is not an air pollutant emitted by industrial activities, unlike VOCs, particulate matter, and sulfur dioxide.

Flue gas desulfurization, selective catalytic reduction, and electrostatic precipitators are all technologies used to reduce air pollution from power plants.

Carbon dioxide is not typically emitted by construction activities, unlike dust, asbestos, and lead.

Precision agriculture, conservation tillage, and crop rotation are all practices used to reduce air pollution from agricultural activities.

Water vapor is not an air pollutant emitted by wildfires, unlike particulate matter, carbon monoxide, and nitrogen oxides.

Indoor air quality management, ventilation, and air purification are all strategies used to reduce air pollution from indoor sources.