DETROIT - The world’s major carmakers appeared split this week over which fuel efficient, lower emission engines will prove to be the wave of the future — hybrid, clean diesel or hydrogen fuel cell.

Despite a tiny presence in the US car market, hybrid vehicles were the most popular topic at the North American International Auto Show this week as auto executives gauged the future of the gas/electric and other engine novelties.

Complete article: Hybrid Cars Stir Buzz But Jury Still Out Long-Term (Planet Ark)