Examlex
The presence of meltwater at the bottom of a glacier can increase its rate of movement.
Pollution
The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
Marginal Social Benefit
The additional benefit society gains from consuming one more unit of a good or service.
Marginal Social Cost
The additional cost imposed on society as a whole by producing one extra unit of a good or service.
Pollution
The addition of pollutants to the natural surroundings, leading to harmful alterations.
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