« previous next »

Author Question: As of 2015, what is the approximate CO2 level in Earths atmosphere? a. 100 ppm b. 200 ppm c. ... (Read 52 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?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

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

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Common sites of amputation. (A) Upper extremities. (B) Lower extremities. The surgeon determines th Common sites of amputation. (A) Upper extremities. (B) Lower extremities. The surgeon determines th
Upper-Level Maps Upper-Level Maps
How to combine approximate and exact numbers when considering significant digits How to combine approximate and exact numbers when considering significant digits
Share of Hours Worked by Education Level, 1940–2008 Share of Hours Worked by Education Level, 1940–2008
World Mean Sea-Level Temperatures in July World Mean Sea-Level Temperatures in July
Causes of Trauma Deaths by Approximate Percentage Causes of Trauma Deaths by Approximate Percentage
Video: Bipolar Disorder

For a complete list of videos, visit our video library