According to Shell, if the concept car was to ever go into production ... it averages 89.1 mpg at 45 mph while emitting 28 percent less CO2 emissions than a typical gasoline-powered city car ...

Japanese automakers welcomed a last-minute deal that will exempt cars running ... to offset the CO2 released from fuel-combustion engines. Porsche AG, Robert Bosch GmbH and Shell are among ...