What can the driver of a vehicle do to reduce the environmental impact of their daily commute? Cars with gas-powered engines, which is still most cars on the road today, emit harmful greenhouse gases (GHG’s) into Earth's atmosphere via their tailpipes. According to a leading organization on climate change, the Union of Concerned Scientists, "...collectively, cars and trucks account for nearly one-fifth of all US emissions, emitting around 24 pounds of carbon dioxide and other global-warming gases for every gallon of gas [consumed]."
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