If the total of those deductions exceedthestandard deduction for your filing status, you will (in most cases) want to claim itemized deductions instead of claiming thestandard deduction.
This year thestandard is 12.6 billion gallons of corn ethanol, which the industry expects to exceed, with other renewables to contribute a little more than 2 billion gallons.
With passive restraints the government wanted to see how various devices worked, but Williamson involves seatbelts and there the government only was interested in setting a minimum standard manufacturers could exceed if they wanted.