Carbon credit trading is a market-based system that allows businesses, countries, or organisations to buy and sell carbon credits, which represent the right to emit one ton of CO₂. The concept behind carbon credit trading is rooted in the cap-and-trade mechanism, which sets a limit (or cap) on the total allowable emissions from all participating entities. These entities are allocated or can purchase emissions allowances that represent a certain amount of CO₂ emissions.
In a cap-and-trade system:
Cap: A total limit is imposed on emissions, which is gradually reduced over time to drive emission reductions.
Trade: If an entity reduces its emissions below the allocated cap, it can sell the excess allowances to other entities that are unable to meet their targets. This creates a market for carbon credits and encourages companies to find cost-effective ways to reduce their carbon emissions.
By putting a price on carbon, carbon credit trading provides economic incentives for companies to cut emissions and invest in cleaner technologies.