« previous next »

Author Question: As of 2015, what is the approximate CO2 level in Earths atmosphere? a. 100 ppm b. 200 ppm c. ... (Read 51 times)

mckennatimberlake

  • Hero Member
  • *****
  • Posts: 559
on: Jul 13, 2018
As of 2015, what is the approximate CO2 level in Earths atmosphere?
   a. 100 ppm
   b. 200 ppm
   c. 400 ppm
   d. 800 ppm
   e. 1200 ppm

Question 2

Approximately when did the rapid increase in human-produced atmospheric CO2 begin?
   a. 1900
   b. 1930
   c. 1950
   d. 1980
   e. 2000


randomguy133

  • Sr. Member
  • ****
  • Posts: 310
Reply #1 on: Jul 13, 2018
Answer to Question 1

ANSWER: c

Answer to Question 2

ANSWER: c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Substrate–level phosphorylation. Substrate–level phosphorylation.
Mechanisms of pain at the nociceptor level Mechanisms of pain at the nociceptor level
Heating of the atmosphere Heating of the atmosphere
Many U.S. regions under threat due to changes in sea level Many U.S. regions under threat due to changes in sea level
Kyoto Protocol encourages industry to innovate and reduce the level of emissions Kyoto Protocol encourages industry to innovate and reduce the level of emissions
Wavelengths that penetrate the earth's atmosphere Wavelengths that penetrate the earth's atmosphere
Video: Lactation and Breast Feeding

For a complete list of videos, visit our video library