Air May Best Be Described As

question 63

Multiple Choice

Air may best be described as:

• A)an element.
• B)one of four basic substances that composes all things.
• C)a compound.
• D)a mixture.

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Definitions:

Carbon Emissions

The release of carbon dioxide and other carbon compounds into the atmosphere, contributing to climate change.

Optimal Level

The most efficient, effective, or desirable point or state for achieving a specific goal or outcome.

Costs of Pollution

The economic, health, and environmental damages caused by the emission of pollutants.

Environmental Standards

Rules established by a government to protect the environment by specifying actions by producers and consumers.