This topic contains a solution. Click here to go to the answer

Author Question: Why are nonpersistent pesticides not as environmentally sound as first thought? What will be an ... (Read 103 times)

Garrulous

  • Hero Member
  • *****
  • Posts: 686
Why are nonpersistent pesticides not as environmentally sound as first thought?
 
  What will be an ideal response?

Question 2

Give an example of environmental injustice.
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Bison

  • Sr. Member
  • ****
  • Posts: 342
Answer to Question 1

For several reasons, however, nonpersistent pesticides are not as environmentally sound as they might appear. First of all, they are persistent enough to ride the food supply from farmer to consumer.' Second, many of the nonpersistent pesticides are far more toxic than DDT. This higher toxicity, combined with frequent applications needed to maintain control, presents a significant hazard to agricultural workers and other exposed to these pesticides. Nonpersistent pesticides may still have far-reaching environmental impacts. For example, to control outbreaks of grasshoppers that eat sunflowers, farmers in Argentina began spraying monocrotophos, an acutely toxic organophosphate pesticide, in 1995 . Shortly afterward, thousands of dead Swainson's hawks were seen in the sunflower fields. It was estimated that 20,000 hawks died in one year, about 5 of the world's population of the species. Another problem is that desirable insects may be just as sensitive as pest insects to nonpersistent pesticides. Finally, nonpersistent chemicals are just as likely to cause resurgences and secondary-pest outbreaks as are persistent pesticides, and pests become resistant to nonpersistent pesticides just as readily, too.

Answer to Question 2

Several examples of environmental injustice were given in this chapter. Students may refer to international trade (discrimination against developing countries via taxes and restricting imports), placement of waste sites, and the disproportionate distribution of improvements to white areas of a city or country.





 

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

For a complete list of videos, visit our video library