Which country has highest carbon emissions?

The correct answer is China. China is currently the world's largest emitter of carbon dioxide (CO2). This high emission level is primarily due to its vast population, rapid industrialization, and significant reliance on coal as a primary energy source for its economic growth and development.

• Options A, C, and D (USA, Russia, and India) are also major global carbon emitters. However, China's total annual carbon emissions surpass those of any other single country, making it the leading contributor to global CO2 emissions.