Fact 1: Using a car causes pollution.

Fact 2: Acid rain is caused by pollution.

Given the two facts above, answer the question "Emission from cars contribute to which weather phenomenon?" with the following options: 
- smog tornadoes
 - acid rain
 - deforestation
 - flooding
 - carbon emission hurricanes
 - Tropical
 - low sea levels
 - climate


 

  acid rain       