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Laurent Cipriani, Associated Press
People gather around the new Lamborghini Aventador SV during a preview show of Volkswagen Group, as part of the 85th Geneva International Motor Show, Switzerland, Monday, March 2, 2015.

GENEVA — Top automakers are vowing to press ahead with weak-selling electric vehicles and zero-emissions technology — even as they unveil powerful, expensive luxury cars sports cars aimed at a growing global automarket.

At the Geneva International Motor Show, BMW AG CEO Norbert Reithofer says Tuesday his company "cannot do without" battery powered vehicles such as its i3 urban compact.

He says that "in the future electric drive vehicles will be in demand."

Daimler CEO Dieter Zetsche says hybrids combining internal combustion and batteries were "truly attractive cars that represent the best of both worlds" and serve as a bridge to future no-emissions vehicles. He cautions that the long-life batteries needed for electrics to conquer the market are at least five years off.