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

Author Question: What are the two classes of chemicals that pose the most serious long-term toxic risk, and how do ... (Read 54 times)

sabina

  • Hero Member
  • *****
  • Posts: 563
What are the two classes of chemicals that pose the most serious long-term toxic risk, and how do they affect food chains?
 
  What will be an ideal response?

Question 2

Define total product life cycle, and describe the many stages at which pollutants may enter the environment.
 
  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

Sassygurl126

  • Sr. Member
  • ****
  • Posts: 320
Answer to Question 1

The two classes of chemicals are heavy metals and persistent organic compounds.
Heavy metals are extremely toxic because, as ions or in certain compounds, they are soluble in water and may be readily absorbed into the body, where they tend to combine with and inhibit the functioning of particular vital enzymes. Even very small amounts can have severe physiological or neurological consequences.
The trait that makes heavy metals and nonbiodegradable synthetic organics particularly hazardous is their tendency to accumulate in organisms.

Answer to Question 2

Our use constitutes only one step in the total product life cycle, a term that encompasses all steps, from obtaining raw materials to final disposal of the product. Implicit in our use of hair spray, for example, is that raw materials were obtained and various chemicals were produced to make both the spray and its container. Chemical wastes and by-products are inevitable in production processes. In addition, consider the risk of accidents or spills occurring in the manufacturing process and in the transportation of raw materials, the finished product, or wastes. Finally, what are the risks of breathing hair spray? What happens to the container you throw into the trash, which still holds some of the hair spray when the propellant is used up?




sabina

  • Member
  • Posts: 563
Reply 2 on: Jul 15, 2018
Excellent


skipfourms123

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

For a complete list of videos, visit our video library