medium · SAT Reading & Writing
Atmospheric scientists have noted that while the burning of fossil fuels releases carbon dioxide, which warms the planet, it also releases aerosols that reflect sunlight and have a temporary cooling effect. Some researchers suggest that this cooling effect is currently masking a portion of the true warming potential of greenhouse gases. As these aerosols are removed through air quality regulations, the underlying warming trend may accelerate.
Which choice best describes the function of the underlined sentence as a whole?
- It argues that fossil fuels should be burned more frequently to ensure the planet remains cool.
- It explains how one environmental factor may be obscuring the full impact of another.
- It proves that air quality regulations are the primary cause of global climate change.
- It provides a chemical analysis of the specific molecules found in volcanic aerosols.
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