Motorists want to be friendlier to the environment, but cash speeds the process.
A survey by the UK's Society of Motor Manufacturers and Traders (SMMT) finds that most people want to do the right thing, but aren't sure how and worry about the cost.
Countries at opposite ends of Europe have different approaches. Romania, scheduled to join the EU next January, pays motorists E860 to replace cars 10 or more years old with a new car. The UK plans to give grants of up to £1,000 (E1,460) to buyers of vehicles emitting less than 115 grams per kilometer of CO2.
Says SMMT CEO Christopher Macgowan: "Buyers may be full of good intentions, but when times are tough, they need support to move into greener motoring."