Cause of Increasing Atmospheric CO2 Stock
The total amount of carbon dioxide in the atmosphere is increasing because the volume of new emissions added each year is substantially greater than the amount removed by natural processes. These removal mechanisms, which function as outflows, include the natural decay of CO2 and its absorption by carbon sinks like forests, but they are insufficient to offset the large inflows from human activity.
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Introduction to Microeconomics Course
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CORE Econ
Ch.2 Technology and incentives - The Economy 2.0 Microeconomics @ CORE Econ
The Economy 2.0 Microeconomics @ CORE Econ
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A bathtub's water level represents the total stock of a particular gas in the atmosphere. The inflow from a faucet represents all emissions of this gas, and the outflow through a drain represents its natural removal from the atmosphere. For many years, the inflow has been approximately double the rate of the outflow. To stabilize the gas's atmospheric stock (i.e., to stop the water level from rising), which of the following actions is the minimum necessary?
Analyzing Atmospheric CO2 Dynamics
Planetary Atmosphere Management Scenario
Imagine the atmosphere is a bathtub, where the water level represents the total amount (stock) of CO2. The faucet represents CO2 emissions (inflow), and the drain represents natural absorption (outflow). If the inflow from the faucet is currently twice as fast as the outflow from the drain, holding the inflow rate constant (i.e., stopping any further increase in emissions) will cause the water level to stabilize.
In the conceptual model that likens the Earth's atmospheric CO2 system to a bathtub, match each component of the real-world system to its corresponding part in the bathtub analogy.
Analyzing Climate Policy with the Bathtub Model
Consider a bathtub where the water level represents the total stock of a pollutant in the atmosphere. The faucet represents the inflow of this pollutant from all sources, and the drain represents the outflow as the pollutant is removed by natural processes. Currently, the faucet is adding 10 units of water per year, while the drain is removing only 5 units per year. If a new policy successfully reduces the inflow to 7 units per year and this new rate is maintained, what will be the immediate effect on the water level in the tub?
Consider the atmosphere as a bathtub. If human activities add 9 billion tons of a gas to the atmosphere each year (the inflow), and natural processes can only remove 5 billion tons of that gas per year (the outflow), the total amount (stock) of the gas in the atmosphere will increase by ____ billion tons that year.
A global council aims to first stop the increase of a certain atmospheric gas and then reduce its total amount back to a previous, safer level. Using the 'bathtub' analogy where the water level is the gas's total amount (stock), the faucet is the emission rate (inflow), and the drain is the natural removal rate (outflow), arrange the following policy stages in the correct logical order to achieve this multi-stage goal.
Evaluating System Dynamics Arguments
CO2 Emissions as an Inflow to the Atmospheric CO2 Stock
Cause of Increasing Atmospheric CO2 Stock
Figure 2.19: The Bathtub Model of the Stock of Atmospheric CO2
Learn After
Imagine a scenario where in Year 1, global CO2 emissions from human activities are 40 billion tons, while natural processes remove 20 billion tons. In Year 2, a global effort successfully reduces emissions to 30 billion tons, while natural removal remains constant at 20 billion tons. Based on this information, what is the net effect on the total amount of CO2 in the atmosphere during Year 2?
A global report indicates that for the first time, the total volume of new CO2 emissions added to the atmosphere in a year has decreased compared to the previous year. This means the total amount (stock) of CO2 in the atmosphere has also started to decrease.
Evaluating a Policy Claim on Atmospheric CO2
Explaining the Continued Rise in Atmospheric CO2
Critiquing a Policy Statement on CO2 Emissions
Match each component of the atmospheric carbon system with the description of its role.
A government announces a new policy projected to reduce its country's annual CO2 emissions by 10% over the next five years. A critic of the policy argues, 'This is not enough. Even if this policy is successful, the total amount of CO2 in the atmosphere will continue to rise.' Which of the following statements provides the strongest logical support for the critic's argument?
Imagine a scenario where global CO2 emissions are significantly reduced, but the total volume of emissions added to the atmosphere each year remains greater than the volume removed by natural processes. Which of the following correctly describes the effect on the total amount of CO2 in the atmosphere?
Multiple Climate Impacts of Deforestation and Land-Use Change
For the total amount of CO2 in the atmosphere to stabilize (i.e., stop increasing), the volume of new emissions added each year must be, at most, ________ to the amount removed by natural processes.
Consider a 20-year period for which we have data on atmospheric carbon dioxide. A graph shows two trends: 'Annual CO2 Emissions' and 'Natural CO2 Removal'. For the entire 20-year period, the 'Annual CO2 Emissions' line is always above the 'Natural CO2 Removal' line. The 'Annual CO2 Emissions' line increases for the first 15 years, reaching a peak at Year 15, and then decreases for the final 5 years. Based on this information, at which point in time is the total amount (stock) of CO2 in the atmosphere the highest?