acid rain : rain , snow or sleet containing hamful chemicals from the burning of fossil
part of speech noun : acid rain can pollute water and soiln , harm crops and trees and even damage the surface of buildings
air pollution : contamination of the air by smoke and gases
part of speech noun : the most serious air pollution comes from the burning of fossil fuels
climateclimate change : long term changes in earth's climate , such as rising temperatures and lower rainfall
.part of speech noun: climate change is affecting every country on every continet