Low-carbon emission
The main components of automobile exhaust are carbon dioxide (CO2) and water vapor (H2O). Carbon dioxide is the most important anthropogenic greenhouse gas (GHG) and the most significant Greenhouse Gas emitted in the U.S. (with 82-84% of all U.S. emissions). Increases in carbon dioxide concentration are due primarily to fossil fuel use and land-use change. The CO2 emission standards can be referred to the fuel or to the vehicle : CO2 mass emission in vehicles is measured in g/km (g/mi * 0.621371192 = g/km).
Low-carbon emission
The main components of automobile exhaust are carbon dioxide (CO2) and water vapor (H2O). Carbon dioxide is the most important anthropogenic greenhouse gas (GHG) and the most significant Greenhouse Gas emitted in the U.S. (with 82-84% of all U.S. emissions). Increases in carbon dioxide concentration are due primarily to fossil fuel use and land-use change. The CO2 emission standards can be referred to the fuel or to the vehicle : CO2 mass emission in vehicles is measured in g/km (g/mi * 0.621371192 = g/km).