How do human produced pollutants differ from natural environmental chemicals?

What is Carson referring to when she writes that there is a human price for the use of toxins?

The “human price” that Carson mentions refers to how people can be slowly poisoned over time from pesticides that build up in their immune system.

Is Rachel Carson opposed to the use of all toxins?

Carson suggested that chemical insecticides and herbicides be called biocides because they cannot be used without destroying life. … Carson is not against the use of all toxins but believes that they need to be heavily regulated.

What does Carson mean by in the modern world there is no time?

Carson argues with time, nature adjusts and changes as needed (evolution), but “in the modern world there is no time.” Carson argues insects need to be controlled, but not indiscriminately, in ways that destroy all insects and harm people in the process.

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Why does Carson argue that insecticides should be called biocides?

Carson believes insecticides should be called biocides because not only do they wipe out the target species but also destroy other species of insects and bigger game that rely on these insects as a food source. How were chemical pesticides originally discovered and used?

What did Carson suggest as an alternative?

Instead of spraying toxic chemicals to kill budworms, Carson proposes the method of natural parasitism, which is attributed to first being proposed by Erasmus Darwin in 1800. Since all insects have “many natural enemies,” including microbes and other insects, E.

How does she describe that toxins enter the water and contribute to water pollution?

This causes scientists to come up with an even deadlier toxin. How do Toxins contribute to water pollution? Toxins in pesticides end up in soil and runoff in lakes and streams. So not only are pesticides killing plant life, they also damage marine life.

How did Rachel Carson’s Silent Spring help change US environmental policies?

Silent Spring was met with fierce opposition by chemical companies, but it spurred a reversal in national pesticide policy, led to a nationwide ban on DDT for agricultural uses, and inspired an environmental movement that led to the creation of the U.S. Environmental Protection Agency.

Why is DDT banned?

Regulation Due to Health and Environmental Effects

In 1972, EPA issued a cancellation order for DDT based on its adverse environmental effects, such as those to wildlife, as well as its potential human health risks. … DDT is: known to be very persistent in the environment, will accumulate in fatty tissues, and.

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In what two principal ways do insects conflict with humans?

Over the course of time since man’s advent, a small percentage of the more than half a million species of insects have come into conflict with human welfare in two principal ways: as competitors for the food supply and as carriers of human disease.

What do you think Carson’s purpose was in ending the final paragraph and the chapter with someone else’s words?

Carson’s purpose in ending the final paragraph with someone else’s words was to put a greater emphasis on credibility.

What is the thesis in the obligation to endure?

In her essay “The Obligation to Endure”, Rachel Carson alerts the public to the dangers of modern industrial pollution. She writes about the harmful consequences of lethal materials being released into the environment.