There are no effective boundaries when it comes to pollutants. Studies have shown that toxic insecticides that have been banned in many countries are riding the wind from countries where they remain legal. Compounds such as DDT and toxaphene have been found in remote places like the Yukon and other Arctic regions.
This paragraph best supports the statement that
  • 1toxic insecticides such as DDT have not been banned throughout the world.
  • 2more pollutants find their way into polar climates than they do into warmer areas.
  • 3studies have proven that many countries have ignored their own antipollution laws.
  • 4DDT and toxaphene are the two most toxic insecticides in the world.
Answer:- 1
Explanation:-

Solution:
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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