Air pollution: this is the contamination of the atmosphere. It is the release of harmful substances such as chemicals and particulates into the atmosphere. Common gaseous air pollutants include carbonmonoxide, sulpur dioxide, chlorofluorocarbons (CFCs) and nitrogen oxides produced by industries and motor vehicles. Photochemical ozone and smog are created as nitrogen oxides and hydrocarbons react to sunlight.
Water pollution: This is the contamination of the water bodies by the release of waste products and contaminants into surface runoff into river drainage systems, inadequate channelling of pipes into the water bodies, leaching into groundwater, liquid spills, wastewater discharge and littering. this adversely affects the aquatic lives and use of rivers, streams by man.
Land pollution: This is the contamination of lands and our immediate environment by the introduction of waste from our homes, inadequate disposal of waste and refuses, oil spillage etc. This however, affects the activities of man and living organisms.