Methane is a secondary air pollutant, formed through chemical reactions involving other pollutants.

PM pollution in urban areas can originate from various sources, including vehicular emissions, industrial activities, and construction and demolition.

Nitrogen Dioxide is not a greenhouse gas, while Carbon Dioxide, Methane, and Water Vapor are.

Emission Control refers to the techniques and technologies used to reduce air pollutants emitted from vehicles.

Industrial Emission Controls are typically implemented at the source of pollution, rather than in urban areas.

The primary goal of air pollution control measures in urban areas is to improve air quality and protect the health of residents.

Tree Planting, Green Roofs, and Permeable Pavements are all examples of green infrastructure measures that can help reduce air pollution in urban areas.

Air Quality Management refers to the comprehensive approach to assessing, monitoring, and controlling air pollution in urban areas.

Ammonia is not typically considered a major air pollutant in urban areas, unlike Sulfur Dioxide, Carbon Monoxide, and Ozone.

NO2 pollution in urban areas can originate from various sources, including vehicular emissions, industrial activities, and power plants.

Tree Planting is not typically considered a strategy for reducing air pollution from industrial sources.

Air Quality Monitoring refers to the process of measuring and quantifying air pollutants in the atmosphere.

Emission Trading Programs are typically implemented at the regional or national level, rather than in specific urban areas.

O3 pollution in urban areas is primarily formed through chemical reactions involving sunlight and other pollutants.

Carbon Capture and Storage is typically implemented at the source of pollution, rather than in urban areas.