In 2017, China was the world's largest emitter of carbon dioxide (CO2). Statista data shows that China's CO2 emissions contributed 28.21 percent of the world's total emissions. The economic growth, accompanied by an increasing number of factories and motor vehicles, has resulted in extremely high air pollution in China.
The United States ranked second, contributing 15.99 percent of the world's carbon dioxide pollution, followed by India in third place with 6.24 percent. Several studies indicate that global warming is a result of the increasing production of CO2 on Earth.
Carbon dioxide pollution began in the mid-18th century with the start of industrialization in Europe and continues to this day in developing countries worldwide. In 1751, the global amount of CO2 was estimated at around 11 million metric tons. This increased more than 1,000 times by 1960. By 2015, CO2 pollution was estimated to have reached 36.2 billion metric tons. The U.S. Energy Information Administration (EIA) projects that carbon dioxide emissions will increase by 46 percent by 2040 compared to current levels.
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