Most acid precipitation results from the combination of with water in the atmosphere, forming strong acids that fall with rain or snow. see concept 3.

Most acid precipitation results from the combination of sulfur and nitrogen oxides with water in the atmosphere, forming strong acids that fall with rain or snow.

Acid rain has low pH because of the elevated levels of hydrogen ions. It can cause damage on plants, animals and infrastructure.  

Forming of acid rain:  

NO2 + OH• → HNO3

SO3 (g) + H2O (l) → H2SO4 (aq)

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )