Methane is not a primary air pollutant, as it is not directly emitted into the atmosphere from human activities. It is a greenhouse gas that is produced naturally and through human activities, such as agriculture and waste management.

Sewage discharge is the primary source of water pollution in urban areas, as it contains untreated or partially treated wastewater from households, industries, and commercial establishments.

Sulfur Dioxide is not a greenhouse gas, as it does not trap heat in the atmosphere. It is an air pollutant that contributes to acid rain and respiratory problems.

Pollution Control refers to the process of removing pollutants from the environment, either through physical, chemical, or biological means.

Solar Panels are not a type of pollution control technology, as they generate electricity from sunlight and do not remove pollutants from the environment.

Pollution Prevention refers to the process of reducing or eliminating the generation of pollutants at the source, rather than relying on end-of-pipe control technologies.

Recycling is not a type of pollution prevention strategy, as it involves the reprocessing of waste materials rather than reducing or eliminating the generation of pollutants.

Remediation refers to the process of restoring an environment that has been damaged by pollution, often involving the removal or treatment of contaminants.

Carbon Capture and Storage is not a type of remediation technology, as it involves the capture and storage of carbon dioxide from industrial processes rather than the restoration of polluted environments.

Mitigation refers to the process of reducing the severity or impact of pollution, often through measures such as reducing emissions or implementing adaptation strategies.

Afforestation is not a type of mitigation strategy, as it involves the planting of trees to increase forest cover rather than reducing greenhouse gas emissions or adapting to climate change impacts.

Environmental Impact Assessment refers to the process of assessing the potential environmental impacts of a proposed project or activity, often involving the identification and evaluation of potential risks and benefits.

Social Impact Assessment is not a type of environmental impact assessment, as it focuses on the social and economic impacts of a proposed project or activity rather than the environmental impacts.

Environmental Policy refers to the process of developing and implementing policies and regulations to control pollution and protect the environment, often involving the establishment of environmental standards and guidelines.

Education and Awareness Campaigns are not a type of environmental policy instrument, as they focus on raising public awareness and understanding of environmental issues rather than directly regulating or incentivizing pollution control.