Natural gas leaks are not a major source of air pollution in urban areas, as natural gas is a relatively clean-burning fuel.

Allergies are not a direct health effect of air pollution, although air pollution can worsen allergy symptoms.

Increasing the use of fossil fuels would worsen air quality, as fossil fuels are a major source of air pollution.

Emission reduction, air pollution control, and pollution prevention are all terms for the process of reducing the amount of air pollution emitted by a source.

Solar panels are not an air pollution control technology, as they do not reduce the amount of air pollution emitted by a source.

Air quality planning is the process of planning and designing urban areas to minimize air pollution.

Climate is not a factor to consider when planning for air quality in urban areas, as it is not something that can be controlled.

An air quality impact assessment is the process of assessing the impact of a proposed development on air quality.

Increased traffic congestion is not a benefit of improving air quality in urban areas, as it would worsen air quality.

An emission standard is a government regulation that limits the amount of air pollution that can be emitted by a source.

State Implementation Plans (SIPs) are not air quality standards, but rather plans developed by states to achieve the National Ambient Air Quality Standards (NAAQS).

Cap and trade program, emissions trading program, and pollution credit trading program are all terms for a program that allows businesses to trade air pollution credits.

Increased government regulation is not a benefit of cap and trade programs, as they are designed to reduce government regulation.

Pollution tax, air pollution tax, and emissions tax are all terms for a tax on air pollution.

Increased innovation is not a benefit of pollution taxes, as they do not provide an incentive for businesses to develop new technologies to reduce air pollution.