The Main Cause of the Increase in the Amount of CO₂

question 55

Multiple Choice

The main cause of the increase in the amount of CO₂ in Earth's atmosphere over the past 150 years is

• A) increased worldwide primary production.
• B) increased worldwide standing crop.
• C) an increase in the amount of infrared radiation absorbed by the atmosphere.
• D) the burning of larger amounts of wood and fossil fuels.

---

Definitions:

University of Pennsylvania

An Ivy League research university located in Philadelphia, known for its strong programs in business, engineering, and medical research.

Random Sample

A selection of members from a broader group, with each member having an equal opportunity to be picked.

News Narrative

The representation or structuring of news information and events into a consistent story or report.

Rejection Region

The range of values in hypothesis testing that, if the test statistic falls within, leads to the rejection of the null hypothesis.