California is seeking to compromise with car makers by dropping a requirement that they sell electric cars, the state's latest attempt to persuade carmakers to end their opposition to the programme, Bloomberg News reported. According to the news agency, citing spokesman Dimitri Stanich, the California Air Resources Board outlined proposed changes to the zero-emission vehicle program on Wednesday that would let companies sell more petrol-electric hybrid and hydrogen fuel-cell cars instead of battery-powered cars starting with 2005 models.