According to an analysis by the World Resources Institute, a nonpartisan think tank based in Washington, D.C., the proposed dual-track system would add significantly to the greenhouse gas emissions that contribute to global warming and pollution.

Letter from Lee Schipper: "From an energy-efficiency standpoint, electric cars are more valuable because they use fewer overall resources. Why can’t we just move to equivalent, existing gasoline cars that get 50 M.P.G. first, then decide if the jump to electricity is worthwhile?"

Letter from Lee Schipper: "From an energy-efficiency standpoint, electric cars are more valuable because they use fewer overall resources. Why can’t we just move to equivalent, existing gasoline cars that get 50 M.P.G. first, then decide if the jump to electricity is worthwhile?"

A fleet of hybrid-electric buses will save the Seattle area 750,000 gallons of fuel yearly. This, according to General Motors Corp. which will equip 235 buses with hybrid technology that is claimed to boost fuel economy up to 60%.