Pollution occurs in different forms; air, water, soil, radioactive, noise, heat/ thermal and light. Every form of pollution has two sources of occurrence; the point and the non-point sources. The point sources are easy to identify, monitor and control, whereas the non-point sources are hard to control.
Communication is a means of passing an information signal from source (sender) to a recipient (receiver) in such a way that the message is understood. communication is the act of interaction,sharing ideas and information between two peoples.
A communication difference is a variation of speech that is shared by a group of individuals within a particular region or culture. This should not be considered a disorder of speech or language. An accent or dialect, for example, is simply a difference, not a disorder. A communication disorder, however, is significantly reduced understanding and/or use of verbal communication. Types of disorders include articulation, language, fluency, and voice.