Air Pollution , causes , effects , prevention. Pollution may be defined as the undesirable change in the physical. Chemical or biological aspects of environment. It makes it harmful for humans. For others living – organisms. There are various types of pollution. Such as air pollution, water pollution, noise pollution.
Dengue is a Dangerous Disease Global incidence of dengue has drastically upped in the last few years. According to the World Health Organisations (WHO), there are about 390 million cases of dengue fever worldwide. The total number of cases, 96 million require medical treatment. Dengue and its symptoms