Plants, trees, and soils naturally emit carbon dioxide (CO2 ) that enters the atmosphere
To form a benchmark level for this greenhouse gas, we can determine the amount of CO2 that would end up in the atmosphere if there were no human activity on the planet. Suppose naturally occurring CO2 emissions are 5 million tons per year, the social discount rate is 5%, and the stock dissipation rate is 2%. What is the eventual level of CO2 in the atmosphere if these natural emissions continue at this rate forever? A) 100 million tons
B) 250 million tons
C) 25 million tons
D) We do not have enough information to answer this question.
B
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Between 1870 and 2010, among the United States, Germany, Japan, and Australia, ________ grew at the fastest rate and ________ grew at the slowest rate
A) United States; Germany B) Germany; United States C) Australia; Japan D) Japan; Australia
Business-class airline tickets cost much more than coach-class tickets because, compared to householders, businesspeople's demand for travel is
a. equally elastic b. unitary elastic c. more elastic d. less elastic e. not a factor in the cost of airline tickets
An economic model is useful only if it:
a. contains no positive statements. b. captures all the complexities of reality. c. yields accurate predictions. d. has both macro- and microeconomic applications.
Beyond the point of efficient scale, marginal cost pulls the average total cost upward
a. True b. False Indicate whether the statement is true or false