« previous next »

Author Question: What is the main source of the increased levels of carbon dioxide in the atmosphere? a. Methane ... (Read 158 times)

sam.t96

  • Hero Member
  • *****
  • Posts: 570
on: Jun 19, 2018
What is the main source of the increased levels of carbon dioxide in the atmosphere?
 
  a. Methane c. Landfills b. Deforestation d. Burning fossil fuels

Question 2

What is the percentage by which CO2 concentration has increased since 1750?
 
  a. 21 c. 41 b. 31 d. 51
McKnight's Physical Geography: A Landscape Appreciation ¦ Hess, Tasa ¦ 12th Edition
Buy Test-Bank


Zack0mack0101@yahoo.com

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jun 19, 2018
Answer to Question 1

ANS: D
The main source of the increased levels of carbon dioxide in the atmosphere is the burning of fossil fuels, causing 75 of the increase.



Answer to Question 2

ANS: B
According to the IPCC carbon dioxide concentration has increased by 31 since 1750.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Ammonium as an energy source for chemoautotrophic bacteria in soil. Ammonium as an energy source for chemoautotrophic bacteria in soil.
Cross-sectional data showing that the amount of effort spent on personal health care increases with Cross-sectional data showing that the amount of effort spent on personal health care increases with
Lilly Martin Spenser’s painting, Domestic Happiness (1844), reflects the change in attitudes toward Lilly Martin Spenser’s painting, Domestic Happiness (1844), reflects the change in attitudes toward
Electrophoresis gel in a densitometer. (a) The green light from the slit light source is visible ... Electrophoresis gel in a densitometer. (a) The green light from the slit light source is visible ...
Remove cold source, and check the knee for changes. Notice skin color and changes in swelling around ... Remove cold source, and check the knee for changes. Notice skin color and changes in swelling around ...
Sulfur dioxide is a toxic gas, has a distinct, pungent odor, and contributes to acid rain and ... Sulfur dioxide is a toxic gas, has a distinct, pungent odor, and contributes to acid rain and ...
Video: Conduction of action potentials

For a complete list of videos, visit our video library