The problem is that with more fuel efficient cars and more expensive gasoline, the gas tax revenues fell. (politics.stackexchange.com)
I saw no harm in wanting more fuel efficient cars or more efficient appliances in a person's home. (theinconvenientskeptic.com)
The government is in the process of implementing a number of policies to reduce personal carbon emissions from individuals including the introduction of smart meters to all homes by 2020, banning non-energy saving light bulbs and banding road tax to encourage people to buy more fuel efficient cars. (politics.co.uk)