acid rain : rain , snow or sleet containing harmgul chemicals from the burning of fossil fuels
part of speech noun : Acid rain can pollute water and soil , harm crops and trees and even damage the surface if buildings
air pollution : contamination of the air by smoke and gases
part of spech noun : the most seious air pollution comes from the burning os fossil fuels
climate 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 continent