Before the Industrial Revolution,the Concentration of CO₂ in Earth's Atmosphere

question 77

Multiple Choice

Before the Industrial Revolution,the concentration of CO₂ in Earth's atmosphere was 265 parts per million (ppm) .At the end of 2012,the concentration was 393 parts per million.Given the correlation of atmospheric CO₂ concentration with global temperature rise,what does this change suggest about the global carbon budget?

• A) It is balanced;CO₂ concentration is not related to the global carbon budget.
• B) It is balanced;rises in CO₂ concentrations measured in ppm will have no effect.
• C) It is unbalanced;CO₂ is entering the atmosphere much faster than it can be removed.
• D) It is unbalanced;CO₂ is being removed from the atmosphere much faster than it can enter.
• E) It is unbalanced,but the imbalance is insignificant because the tiny CO₂ concentrations will have no effect.

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Definitions:

Fixed Manufacturing Overhead

Costs that do not vary with the level of production, such as rent, insurance, and salaries for managers.

Contribution Margin

What’s left of the sales proceeds once variable expenditures are taken out.

Direct Labor

The labor costs directly attributed to the production of goods or services; it includes wages paid to workers physically making a product.

Constrained Resource

A limited resource in a production process that can restrict the company's ability to produce goods, impact scheduling, and ultimately affect throughput.