The EPA Began to Limit the Sulfur Content of On-Road

question 59

Multiple Choice

The EPA began to limit the sulfur content of on-road diesel fuel in 1993 to 0.05% mass or 500 ppm maximum, which mandated the production of:

• A)low-sulfur diesel (LSD) fuel"
• B)sulfur free diesel fuel"
• C)biodiesel
• D)ultra-low-sulfur diesel (ULSD)"

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Definitions:

Estuaries

Coastal water bodies where freshwater from rivers meets and mixes with saltwater from the ocean, creating unique and richly biodiverse environments.

Salinity

The measure of the amount of dissolved salts in a given amount of liquid.

Mangrove Swamp

Coastal wetlands found in tropical and subtropical regions, characterized by salt-tolerant trees and bushes adapted to high salt and brackish water conditions.

Euphotic Zone

The upper layer of a body of water that receives sufficient sunlight for photosynthesis, where most aquatic life is concentrated due to the availability of light.