清潔與綠色概念成了在底特律Cobo Hall舉行的北美國際車展的熱門關鍵字。各大汽車公司相繼推出最新款式的綠色概念車，比較彈性燃料車輛（flex-fuel cars）的燃油經濟性，甚至宣布美國利曼賽事（Le Mans Series）將在賽場上變的更環保。
但並不是每個人都買帳。代表非營利團體「雨林行動網」（Rainforest Action Network）發言的裘帝‧范洪說：「今年北美國際車展上的綠色主題只不過是作作樣子而已。」「近兩年來在這些車展上的『環保』不過是花言巧語，並沒有真正反映到車輛的生產過程。」汽車業者只不過想讓消費者錯認他們生產的是環境有好的車輛，事實卻不然。
本田汽車2007年11月的洛杉磯車展首次推出了一款名為FCX Clarity的燃料電池車，它以本田五代的氫燃料電池組作為動力，且不會產生任何碳排放。
在13日的記者會上，豐田汽車的總裁渡邊捷昭先生宣布了該公司新的環境進程，其中包括於「不久的將來」在Tundra與Sequoia兩款車型上安裝清潔的柴油V8引擎。
豐田汽車因為Prius油電混合車因引了許多具環保意識的消費者，同時也因為生產上述較為污染的大型車而招致批評。
福特汽車公司說他們的車正變得越來越環保，而消費者看得見這樣的轉變。福特在2008出場的Mustang車型中推車了以「黃豆基質塑膠」科技製成的椅墊與椅背，他們並計畫發展目前在車頂金屬與內襯間的玻璃纖維的生物材質替代品。
來自加拿大，在21國有63個據點的Woodbridge公司亦在車展中產出了以「綠色」聚酯製成的緩衝材質，此材質以植物油製成，而非傳統使用的石油。
Clean and green is the buzz at this year's North American International Auto Show at Cobo Hall with major automakers showing their latest greener concept cars, comparisons of fuel economy for flex-fuel cars, and the announcement that the American Le Mans Series is going an extra green mile on the racing circuit.
But not everyone is sold. "The green theme at this year's North American International Auto Show is window dressing," said Jodie Van Horn of the nonprofit Rainforest Action Network. "The environmental rhetoric coming out of the last two years of 'eco' auto shows does not reflect true vehicle production. The industry's goal has been to fool consumers into believing that automakers are producing eco-conscious cars. Nothing could be further from the truth."
Honda is showing the FCX Clarity fuel cell vehicle, which debuted in November at the Los Angeles Auto Show. The FCX Clarity is a zero-emissions, hydrogen-powered fuel cell vehicle powered by the new Honda V Flow fuel cell stack.
At a media reception Sunday, Katsuaki Watanabe, president of Toyota Motor Corporation, announced the company's new environmental agenda, including a new clean diesel V8 engine in both the Tundra and Sequoia "in the near future."
Toyota has attracted environmentally conscious buyers for its hydrid Prius, but has also attracted negative attention for these larger, more polluting models.
Ford says its cars are getting greener even though improvements may be visible to consumers. Ford is launching soy foam technology in the seat cushions and seat backs of the 2008 Mustang and developing a sustainable bio-based replacement for the fiberglass now used between the headliner of a vehicle and the roof sheet metal.
Cushions of "green" polyurethane BioFoam made from plant oils, not petroleum, are being offered at the show by the Woodbridge Group, a Canadian company with 63 facilities operating in 21 countries.
全文及圖片詳見 ：ENS
