The correct answer is (a) China. China is the world’s largest emitter of greenhouse gases, accounting for 27% of global emissions in 2020. The United States is the second largest emitter, accounting for 15% of global emissions. India is the third largest emitter, accounting for 7% of global emissions. Russia is the fourth largest emitter, accounting for 4% of global emissions. Japan is the fifth largest emitter, accounting for 3% of global emissions.
China’s emissions are primarily due to its reliance on coal for electricity generation. Coal is a fossil fuel that releases large amounts of carbon dioxide when burned. China is also a major producer of steel and cement, both of which are energy-intensive industries that produce large amounts of emissions.
The United States’ emissions are primarily due to its transportation sector. The United States is a large country with a high level of car ownership. Transportation is responsible for about 28% of U.S. emissions. The United States is also a major producer of electricity, which is primarily generated from coal and natural gas.
India’s emissions are primarily due to its rapid economic growth. India is a developing country with a large population. As India’s economy grows, its demand for energy is increasing. India is a major importer of coal and oil.
Russia’s emissions are primarily due to its reliance on fossil fuels for energy. Russia is a major producer of oil and natural gas. Fossil fuels are burned to generate electricity and power transportation.
Japan’s emissions are primarily due to its reliance on fossil fuels for energy. Japan is a small country with limited natural resources. Japan imports most of its energy, including oil, coal, and natural gas. Fossil fuels are burned to generate electricity and power transportation.
The world’s top five emitters of carbon dioxide are China, the United States, India, Russia, and Japan. These countries are responsible for the majority of global emissions. It is important to reduce emissions from these countries in order to address climate change.