The Increase in Greenhouse Gases During the Last 130 Years

question 67

Multiple Choice

The increase in greenhouse gases during the last 130 years is primarily a result of ________.

• A) the excessive burning of fossil fuels by humans.
• B) the escape of these gases from plate boundaries and volcanoes.
• C) increased sunspot activity that accelerates plant photosynthesis rates.
• D) the release of excessive amounts of carbon from the oceans.
• E) widespread use of chemical fertilizers in agriculture.

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Definitions:

Holophrases

Single-word expressions used by infants, which convey a complete thought or request.

Months

Units of time in calendars that approximate the natural period related to the motion of the moon; divisions of the year.

Dada

An art movement of the European avant-garde in the early 20th century, characterized by its mockery of materialistic and nationalistic attitudes.

Child-Directed Speech

A simplified and exaggerated form of language used by adults when communicating with young children, characterized by a higher pitch and slower tempo.