Question

A carbon credit is a tradable permit or certificate that provides the holder of the credit the right to emit ______________-tonne of carbon dioxide

• A. 1.0
• B. 0.20
• C. 0.10
• D. 0.30

Hint:

Remember: 1 Credit = 1 Tonne $CO_{2}$. This is the fundamental math used in the multi-billion dollar global carbon market.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks for the standard unit of measurement for one "carbon credit," which is the basic currency used in international emissions trading systems.

Step 2: Detailed Explanation:

• A carbon credit is a generic term for any tradable certificate or permit representing the right to emit one metric tonne of carbon dioxide ($CO_{2}$) or an equivalent amount of a different greenhouse gas ($CO_{2}e$).

• The concept was formalized under the Kyoto Protocol's Clean Development Mechanism (CDM), allowing countries or companies that reduce their emissions to sell their excess "credits" to those that exceed their targets.

• In forestry, this is highly relevant as projects like reforestation or REDD+ (Reducing Emissions from Deforestation and forest Degradation) can generate credits by sequestering carbon in trees. Every tonne of carbon "locked" in the forest can potentially be sold as one credit.

• This market-based approach incentivizes environmental conservation by giving a tangible monetary value to carbon sequestration.

• The standard unit is universally fixed at 1.0 metric tonne; smaller fractions (like 0.1 or 0.2) are not standard units of trade in carbon markets.

Step 3: Final Answer:
One carbon credit represents the right to emit 1.0 tonne of carbon dioxide.