Leachate is a:

AGreen house gas

BAir pollution

CLiquid discharged from a landfill site ✓ Correct

DOzone depleting substance

Correct answer: (C) Liquid discharged from a landfill site

Explanation

Leachate is the liquid that drains out of a landfill after water percolates through the buried waste and picks up dissolved contaminants.

A greenhouse gas is an atmospheric gas that traps heat, not a liquid from a landfill.

Air pollution refers to contamination of the air, not to landfill drainage.

An ozone-depleting substance is a chemical that harms the ozone layer, unrelated to landfill liquid.

Leachate can carry heavy metals and organic pollutants that threaten soil and groundwater.

Modern landfills use liners and collection systems to capture and treat leachate.

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