CO2 emissions
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Are Large Cities More Pollution Efficient?
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New research explores how population size relates to CO2 emissions efficiency.
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Rising Fuel Costs Drive Up Carpooling Rates
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A new study finds that drivers respond to higher fuel prices by forming more carpools and finding substitute modes of transportation.
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Climate Change: It’s the Economy, Stupid
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New research suggests economic growth plays a larger role in climate change than population growth