Acid rain is result of $SO_{2}$ and $NO_{2}$ pollution in atmosphere,$\ SO_{2}$ causes formation of $H_{2}SO_{4}$and $NO_{2}$ causes formation of$\ HNO_{3}$.Both are strong acids.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.