The Main Cause of the Increase in the Amount of Carbon

question 18

Multiple Choice

The main cause of the increase in the amount of carbon dioxide in Earth's atmosphere over the past 150 years is ________.

• A) increased worldwide primary production
• B) an increase in the amount of infrared radiation absorbed by the atmosphere
• C) the burning of larger amounts of wood and fossil fuels
• D) additional respiration by the rapidly growing human population

---

Definitions:

Confidence Interval

An estimate of an interval in which a population parameter lies, based on sample data, with a specified level of certainty.

Body Fat

A component of the body that consists of stored fat and is essential for normal physiological and metabolic functions.

Correlation

An indicator that measures the degree to which multiple variables vary in unison.

Denseness

A measure of the compactness or crowding of objects within a given area or volume.