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But when it comes to reducing pollution-causing emissions, electric vehicles have a lot of competition from cars powered by natural gas.
CNN: Natural gas vehicles on a roll in U.S.
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Governments are solidly behind the new vehicles, which they see as essential for bringing down carbon-dioxide emissions and reducing pollution in cities.
ECONOMIST: Electric cars
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Due to costs associated with reducing sulfur emissions resulting from stricter pollution regulations, subbituminous coal is actually more economical for energy generation.
FORBES: Chinese Demand Will Drive This Wyoming Coal Stock
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But now the Australian government's aim will be to cut 159m tonnes of carbon pollution by 2020, reducing emissions by 5% below 2000 levels.
BBC: Australia plans to impose carbon tax on worst polluters
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But the traffic increase has slowed progress in reducing emissions further, and people in many areas still suffer from nitrogen-related air pollution, including small particulates that get sucked deep into the lungs, and ground-level ozone - a strongly irritant gas formed by the action of sunlight on reactive nitrogen.
BBC: Nitrogen pollution 'costs EU up to ?280bn a year'
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Although the United States has made great strides in reducing pollution in recent decades, we are still the world's second largest source of greenhouse gas emissions, with emissions per capita four times higher than China's.
CNN: Coal-burning CEO: U.S., China must fight pollution