Study: More than 6 million could die early from air pollution every year

Updated 2222 GMT (0622 HKT) September 16, 2015

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Burning fossil fuels for electricity and heat is, by far, the main driver of climate change. Emissions from those sectors account for nearly a third of global greenhouse gas emissions, according to the <a href="http://www.wri.org/" target="_blank">World Resources Institute</a>. These activities are the biggest climate villains, statistically speaking.

Photos: What's causing climate change? Meet the top 10 villains

Electricity and heat: 30.6% – Burning fossil fuels for electricity and heat is, by far, the main driver of climate change. Emissions from those sectors account for nearly a third of global greenhouse gas emissions, according to the World Resources Institute. These activities are the biggest climate villains, statistically speaking.

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Transportation -- driving, flying and the like -- makes up nearly 15% of global climate-change pollution, according to 2012 data synthesized by WRI. It's the second-most important cause of dangerous global warming.

Photos: What's causing climate change? Meet the top 10 villains

Transportation: 14.8% – Transportation -- driving, flying and the like -- makes up nearly 15% of global climate-change pollution, according to 2012 data synthesized by WRI. It's the second-most important cause of dangerous global warming.

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Manufacturing and construction are less often discussed than transit, but they contribute nearly as much to climate change: 13.3% of emissions, WRI says. These activities are the third-biggest contributors of heat-trapping emissions.

Photos: What's causing climate change? Meet the top 10 villains

Manufacturing and construction: 13.3% – Manufacturing and construction are less often discussed than transit, but they contribute nearly as much to climate change: 13.3% of emissions, WRI says. These activities are the third-biggest contributors of heat-trapping emissions.

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Likewise, our food systems are villains in the fight against climate change. Advocates say giving up meat, especially beef, would help curb greenhouse gases. Agriculture makes up 11.1% of global emissions, according to WRI.

Photos: What's causing climate change? Meet the top 10 villains

Agriculture: 11.1% – Likewise, our food systems are villains in the fight against climate change. Advocates say giving up meat, especially beef, would help curb greenhouse gases. Agriculture makes up 11.1% of global emissions, according to WRI.

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Burning other types of fuel, including wood, accounts for 8.2% of emissions. Also included in this category are fuels burned in commercial and residential buildings, as well as burning fuel for agriculture and deep-sea fishing.

Photos: What's causing climate change? Meet the top 10 villains

Other fuel combustion: 8.2% – Burning other types of fuel, including wood, accounts for 8.2% of emissions. Also included in this category are fuels burned in commercial and residential buildings, as well as burning fuel for agriculture and deep-sea fishing.

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Industry adds 5.8% of global carbon and greenhouse gas emissions, according to WRI. Cement and aluminum production, shown here, are among the major contributors.

Photos: What's causing climate change? Meet the top 10 villains

Industrial processes: 5.8% – Industry adds 5.8% of global carbon and greenhouse gas emissions, according to WRI. Cement and aluminum production, shown here, are among the major contributors.

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