At the Start of the Twentieth Century,life Expectancy in the United

question 19

Multiple Choice

At the start of the twentieth century,life expectancy in the United States was

• A) slightly less than 50 years.
• B) slightly less than 60 years.
• C) slightly greater than 60 years.
• D) similar to what it is today.
• E) slightly greater than 70 years.

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Definitions:

Global Warming Chemicals

Substances contributing to the greenhouse effect and global warming, typically including carbon dioxide, methane, nitrous oxide, and fluorinated gases.

Ratified

Formally approved or confirmed, often used in the context of treaties, contracts, or agreements that have gone through a formal validation process.

Ex Situ Conservation

Ex situ conservation is the preservation of components of biological diversity outside their natural habitats, such as in zoos, seed banks, or aquariums.

National Park

A natural area protected for its scenic beauty, biodiversity, and recreational opportunities, often managed by governments for conservation and public enjoyment.