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 pollutant [pә'lu:tәnt]   添加此单词到默认生词本
n. 污染物质

[法] 污染物




    pollutant
    [ noun ]
    waste matter that contaminates the water or air or soil
    <noun.substance>


    1. He pleaded innocent to state charges of operating a vessel under the influence of alcohol or drugs, and negligent discharge of a pollutant without a permit.
    2. West Germany (before unification) consumed just over 1m tonnes a year with just over half collected after use. The dumped oil is not only a wasted resource but a powerful pollutant which can contaminate land, poison water supplies and destroy wildlife.
    3. A human pollutant _ chlorofluorocarbons, or CFCs _ is destroying the ozone. Governments are trying to reduce CFC releases, but the question for the 1990s is whether it is too little too late.
    4. He is also charged with negligent discharge of a pollutant without a permit.
    5. Tougher tailpipe emission controls on automobiles would reduce smog-causing pollutants by 22 to 60 percent, depending on the pollutant.
    6. Under the agreement, Ciba-Geigy and two one-time managers of the Toms River plant pleaded guilty to a fourth degree misdemeanor charging the unlawful discharge of a pollutant, a violation of the Water Pollution Control Act.
    7. The microbe offers a simpler and more effective way of treating the pollutant, the two companies say.
    8. Now we're breathing better air because there is less carbon monoxide, which is the principal pollutant," said Alfred Szwarc, manager of the Vehicle Pollution Control Department of Cetesb, Sao Paulo's environmental protection agency.
    9. EPA tests found the cars exceeded air-pollution standards for carbon monoxide in exhaust and for gasoline vapors, which contribute to the formation of ozone, a ground-level pollutant.
    10. It allows anything to be described as a pollutant, even if damage has not been observed.
    11. The testimony was the closest Mr. Thomas has come to predicting imposition of so-called construction bans for areas plagued by ozone, the nation's most troublesome air pollutant.
    12. Diversity and difference, tension and argument are the lifeblood of society, not an unwanted social pollutant. The best societies are dynamic because they are rich in diversity and innovation.
    13. The boiler, a steel-encased tower 110 feet high, lets operators maintain a temperature high enough to maximize the chemical reaction between the coal and limestone but low enough not to create many nitrogen oxides, another pollutant.
    14. They said the machines emit isopropyl alcohol vapors that contribute to the creation of ozone, a common air pollutant.
    15. Carbon monoxide, a toxic pollutant, was set at 3.4 grams per mile from 1992-99 _ retaining current law _ and 1.7 grams afterward under the Waxman proposal.
    16. "People have to demand recycling," said Brian Hunt, southern regional toxics coordinator for Greenpeace. "Mercury is a global pollutant, and there is no pollution control equipment that captures all of it.
    17. This ratio is important in determining which pollutant is more important to attack in reducing smog.
    18. However, Germany's argument against atrazine is based on the chemical's potential as a groundwater pollutant.
    19. Allowances for only about half the utility industry's current emissions of sulfur dioxide, a pollutant linked to acid rain, would be doled out. So, overall emissions would have to be sharply reduced.
    20. Ozone is an air pollutant at low altitudes, but in the stratosphere it shields Earth from harmful ultraviolet radiation. Scientists say reduction of the ozone layer will cause more skin cancers and might trigger climatic changes.
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