Any part of ozone layer that has become deplpted by atmospheric pollution, resulting in excess ultraviolet radiation passing through the atmosphere.
Acid
An acid is a chemical substance that adds hydrogen ions to a solution.
Coal gasification
Production of combustible organic gases( mostly methane) by applying heat to coal in an oxygen enriched enviornment.
Green house effect and GH gases
1. Chem. substance that increase earths surface temp bc they act like glass in a greenhouse.
2. sunlight is absorbed by plants, dirt, building and is converted into heat. The heat is infrared radiation then lises, but is trapped in atmosphere by GH.