Which Is True of the Amount of CO2 in Our

question 57

Multiple Choice

Which is true of the amount of CO2 in our atmosphere?

• A)CO2 is the most abundant gas in the atmosphere.
• B)The level of CO2 has been decreasing at the rate of 3.1% per year since 2000.
• C)The level of CO2 increased at the rate of 1.1% per year from 1990 to 1999.
• D)The level of CO2 has been much higher during the past 800,000 years than it is now.

---

Definitions:

Effective Communication

The exchange of information or ideas in a manner that is clear, concise, and understood by all involved parties.

Double-Checking

The act of verifying or reviewing information, work, or details a second time to ensure accuracy or correctness.

Conversational Ritual

Patterns or practices followed during communication that serve to establish or maintain social bonds.

Rapport Talk

Talk focused on sharing information about relationships.