5: Japan is the world's biggest consumer of fossil fuels and the fifth-largest emitter of greenhouse gases.
4: Russia is the world's largest country by land area and is highly dependent on fossil fuels like oil, coal, and gas.
3: India has released 3.5 billion tons of CO2, and 14 of the world's 15 most contaminated cities are located there.
2: America is the world's most commercially polluted country, It has released 6 billion tons of CO2.
1: China's industry is a serious threat to the planet due to its large export market and heavy use of coal.
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