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In-situ based bio remediation involves introducing __________________ to contaminated areas.

(a) Oxygen and nutrients

(b) Carbon dioxide and methane

(c) Nitrogen and CO2

(d) CO and methane

The question was posed to me during a job interview.

My question comes from Problem Soil Management & Remediation in portion Management and Remediation of Problem Soil of Environmental Biotechnology

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Correct answer is (d) CO and methane

Easiest explanation: Oxygen and nutrients are introduced to contaminated areas during bio remediation, CO2, methane, Nitrogen, CO, methane is not required to treat contaminated lands.

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