The energy minister, Malcolm Wicks, said today he wants to move against the "crass irresponsibility" of drivers of petrol-guzzling 4x4 vehicles.
Mr Wicks told the Times he would like British and European car manufacturers to follow the lead of Toyota, the Japanese manufacturer of the Prius hybrid vehicle. The government offers Prius buyers a £1,000 subsidy, but the energy minister said that was no longer enough, hinting that car companies might be given incentives to invest in developing greener vehicles.
Guardian Unlimited