This could be a great time to trade in your older car or truck for one that's more fuel efficient.
The AirCheckTexas Drive a Clean Machine program is back for a limited time. It offers vouchers for up to $3,500 to help motorists buy more environmentally friendly vehicles.
If your vehicle has failed the emissions portion of the annual state inspection, you can get up to $600 for repairs.
And if your car is more than 10 years old, you can apply for a voucher toward a qualifying replacement vehicle.
The program funding is limited, and requests will be processed on a first-come first-served basis.