Identify the Letter of the Choice That Best Matches the Phrase

question 50

Multiple Choice

Identify the letter of the choice that best matches the phrase or definition.
-It is nested within a single audio section to provide several versions of the same media file.

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Definitions:

Acid Deposition

The falling of acids and acidifying agents from the atmosphere to the Earth's surface, typically as rain, snow, or dust.

Natural Gas

A fossil fuel comprised mainly of methane, used as an energy source for heating, electricity generation, and as a fuel for vehicles.

Lime

A substance made from limestone that has various industrial, agricultural, and environmental uses, including adjusting soil pH, water treatment, and in the manufacture of building materials.

Indoor Formaldehyde Pollution

The presence of formaldehyde, a toxic chemical, in indoor environments, often originating from building materials, household products, and furnishings, leading to various health risks.