Demand-based pricing is not a common method for pricing water because it is difficult to implement and can lead to inequitable outcomes.

Water scarcity is the term for the situation where the demand for water exceeds the available supply.

Improved water conservation practices are not a consequence of water scarcity, but rather a response to it.

Water opportunity cost is the term for the economic value of water, which is the value of the next best alternative use of water.

Grey water trade is not a type of water trade, as it refers to the reuse of wastewater.

Water pollution externalities are the economic impacts of water pollution that are not borne by the polluter.

Production costs are not a type of water pollution externality, as they are borne by the polluter.

Water pollution control benefits are the economic value of the benefits of water pollution control, which include improved health, environmental quality, and recreation opportunities.

Production benefits are not a type of water pollution control benefit, as they are not related to health, environmental quality, or recreation.

Water pollution control costs are the economic value of the costs of water pollution control, which include the costs of treatment, monitoring, and enforcement.

Research and development costs are not a type of water pollution control cost, as they are not directly related to the implementation of water pollution control measures.

Water conservation benefits are the economic value of the benefits of water conservation, which include reduced water use, lower water bills, and improved environmental quality.

Increased economic growth is not a type of water conservation benefit, as it is not directly related to the reduction of water use.

Water conservation costs are the economic value of the costs of water conservation, which include the costs of water-saving devices, changes in water use practices, and public education campaigns.

Costs of water pollution control are not a type of water conservation cost, as they are not directly related to the reduction of water use.