One carbon credit contains:

Correct option is D

Correct Answer: D)1 tonne of CO₂ (Carbon Dioxide) or equivalent greenhouse gas
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Explanation:
A carbon credit is a permit that allows an entity to emit one tonne (1,000 kg) of CO₂ or an equivalent amount of another greenhouse gas. These credits are used in carbon trading markets to reduce overall emissions by incentivizing businesses to cut their carbon footprint.

Information Booster:
Carbon credits are part of cap-and-trade programs aimed at reducing global carbon emissions.
Companies that emit less than their allocated limit can sell excess credits to those exceeding their limits.
The Kyoto Protocol (1997) and Paris Agreement (2015) promote carbon trading as a climate change mitigation strategy.
Additional Information:
1 kg of CO₂ – Incorrect, as one carbon credit represents 1 tonne (1,000 kg), not just 1 kg.
100 tonnes of CO₂ – Incorrect, as one credit equals 1 tonne, not 100 tonnes.
10 kg of CO₂ – Incorrect, since carbon credits measure in metric tonnes.