« previous next »

Author Question: In the late 1970s, the United States banned the non-essential use of chlorofluorocarbons (CFCs). ... (Read 56 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
on: Jul 13, 2018
In the late 1970s, the United States banned the non-essential use of chlorofluorocarbons (CFCs). Why?
 A) CFCs are a primary component of photochemical smog.
  B) CFCs are toxic gases.
  C) CFCs reduce the ozone concentration in the stratosphere.
  D) CFCs react with water vapor to form acid rain.

Question 2

Methane (CH4 ), nitrous oxide (N2O), and chlorofluorocarbons (CFCs) are greenhouse gases.
  Indicate whether the statement is true or false


lorealeza77

  • Sr. Member
  • ****
  • Posts: 356
Reply #1 on: Jul 13, 2018
Answer to Question 1

C

Answer to Question 2

True


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Several species of squirrels have melanistic phases. In large parts of United States and Canada, the Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Annual Water Use in the United States Annual Water Use in the United States
Countries of Origin of Unauthorized Immigrants to the United States Countries of Origin of Unauthorized Immigrants to the United States
Weight management is such a hot topic in the United States that it is frequently Weight management is such a hot topic in the United States that it is frequently
Household Income in the United States by Quintiles, 2009 Household Income in the United States by Quintiles, 2009
Vitamin and minerals are essential for normal body functioning. Vitamin and minerals are essential for normal body functioning.
Video: Glycolysis Animation

For a complete list of videos, visit our video library