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command-and-control legislation
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Side-by-side diagrams compare command-and-control and cap-and-trade approaches to pollution control. The left shows both Plant A and Plant B each reducing emissions by 50 tons, resulting in higher total costs. The right shows cap-and-trade, where Plant A reduces emissions by 75 tons and Plant B by 25 tons, with Plant B paying Plant A for extra reductions, leading to lower overall costs. Emission levels, reduction amounts, and costs are labeled for both methods.
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command-and-control legislation

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Side-by-side diagrams compare command-and-control and cap-and-trade approaches to pollution control. The left shows both Plant A and Plant B each reducing emissions by 50 tons, resulting in higher total costs. The right shows cap-and-trade, where Plant A reduces emissions by 75 tons and Plant B by 25 tons, with Plant B paying Plant A for extra reductions, leading to lower overall costs. Emission levels, reduction amounts, and costs are labeled for both methods.
emissions trading How emissions trading works

Assume two emitting plants, A and B. Each plant emits 100 tons of pollutants (for a total emission of 200 tons), and the requirement is that these emissions be cut in half, for an overall reduction of 100 tons.

(Left) In a traditional command-and-control system, each plant might be required to reduce by 50 percent, or 50 tons, to meet the overall reduction of 100 tons. Plant A might be able to reduce at only $100 a ton, for a total expenditure of $5,000. Plant B might have to spend $200 a ton, for a total of $10,000. The cost for both plants to reach the overall reduction of 100 tons would therefore be $15,000.

(Right) In a cap-and-trade system, each plant might be given allowances for only half its previous emissions. Plant A, where reduction costs only $100 a ton, might be able to reduce emissions to as little as 25 tons, leaving it with unused allowances for 25 tons of pollutants that it is not emitting. Plant B, where reduction costs $200 a ton, might find it less costly to reduce to only 75 tons and then buy Plant A's unused allowances, effectively paying Plant A to make the 25 tons of reductions that Plant B cannot afford. The overall reduction of 100 tons would still be reached but at a lower overall cost ($12,500) than under the command-and-control system.

Command-and-control legislation is a primary type of environmental law. It involves three key elements: identifying environmentally harmful activities, setting specific standards or conditions for those activities, and prohibiting non-compliant actions. For instance, laws may regulate pollutant discharges into water or set air emission thresholds. These regulations can also apply to activities with a risk of pollution, such as transporting hazardous waste or logging. Standards can be set for the maximum allowable pollutant in the environment (environmental-quality standards) or for the amount a source can discharge (emission standards). Management practices, like requiring double-hulled oil tankers, are also part of this legislation. This approach is common when market-based solutions are not feasible.12

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5 Britannica Sources
  1. environmental law - Command-and-control legislation
  2. environmental law - Economic incentives
  3. environmental policy
  4. environmental economics - Command and control
  5. environmental law - Historical development

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