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.

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Definitions:

Productivity Growth

The increase in the efficiency of production, measured by the amount of goods and services produced per unit of input.

Unionized Workers

Employees who are members of a union, which is an organized association formed to protect and further their rights and interests.

Substitution Effect

The economic understanding that as prices rise or income decreases, consumers will replace more expensive items with less costly alternatives.

Income Effect

The change in an individual's or economy's purchasing power due to a change in income, affecting the quantity of goods and services bought.