What is Article 6 of the Paris Agreement?

Article 6 of the Paris Agreement (2015) lets countries cooperate on emission reductions:

• Article 6.2 allows countries to transfer emission reductions to each other as "internationally transferred mitigation outcomes" (ITMOs). When a host country transfers a reduction, it must make a corresponding adjustment, meaning it adds the tonne back to its own accounts so that only the buyer counts it.
• Article 6.4 creates a UN-supervised crediting mechanism, now called the Paris Agreement Crediting Mechanism, overseen by a Supervisory Body, that issues A6.4ERs.

The detailed rules for both were negotiated at successive UN climate conferences. They matter for India because India's government also discusses Article 6 cooperation alongside its domestic carbon market.