Under the Paris Agreement, which instrument do countries use to commit to emissions reductions?

• A. Nationally Determined Contributions (NDCs).
• B. Global emission cap treaties.
• C. Bilateral tax agreements on carbon.
• D. Local zoning laws.

Answer: (A)

Nationally Determined Contributions are the mechanism countries use to commit to emissions reductions. Each nation voluntarily sets its own targets and the actions needed to reach them, reflecting its own circumstances and capabilities. This bottom-up approach means targets can be tailored locally, and every five years countries update and typically raise their ambition. The process is supported by a transparency framework that tracks progress and provides accountability, encouraging continual improvement. This differs from a single global cap or top-down mandate, as there is no universal emissions cap for all countries, and it isn’t driven by bilateral carbon taxes or domestic zoning rules.