Cars batteries contain sulfuric acid. These batteries are necessary to make the car start and also can recharge when the car is running.
Sulfuric acid can be used to treat phosphate rock which creates water soluble phosphates which is essential for plant growth and survival
To go from DNT (Dinitrotoluene) to TNT (Trinitrotoluene) it requires the use of highly hazardous Sulfuric Acid along with other chemicals and high temperatures.