- toxic insecticides such as DDT have not been banned throughout the world.
- more pollutants find their way into polar climates than they do into warmer areas.
- studies have proven that many countries have ignored their own antipollution laws.
- DDT and toxaphene are the two most toxic insecticides in the world.
- even a worldwide ban on toxic insecticides would not stop the spread of DDT pollution.
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Answer: Option 1
The support for this choice is in the second sentence, which states that in some countries, toxic insecticides are still legal. Choice b is incorrect because even though polar regions are mentioned in the paragraph, there is no support for the idea that warmer regions are not just as affected. There is no support for choice c. Choice d can be ruled out because there is nothing to indicate that DDT and toxaphene are the most toxic. Choice e is illogical.
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