ドイツ連邦陸運局（KBA）の統計によると、乗用車新車登録の二酸化炭素 （CO2）平均排出量は走行1キロメートル当たり141.8グラムとなり、前年に比べ3.0％低減した。
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ブランド別では、スマートが96.9g／kmで最もCO2排出量が少なかった。
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前年比の減少幅を見ると、ドイツメーカーではポルシェの17.6g／km、国外ブランドではランドローバーの20.5g／kmが最も大きかった。
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