So, what's the deat? Well, basically the U.S. government would love to help you feel green by driving a hybrid SUV. In the Tribute's case, you can get either $3,000 (by buying the 2WD version) or $2,200 (the 4WD). Like the all other IRS hybrid tax credits, this amount will drop after Mazda reports it has sold 60,000 hybrids. Anyone want to guess when that will be?