Noise Pollution & Human Health
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Most of society is now aware that noise can damage hearing. There are two types of hearing loss: Conductive and Sensorineural. In conductive deafness sound-pressure waves never reach the cochlea, most often as a consequence of a ruptured eardrum or a defect in the ossicles of the middle ear. Conductive hearing loss can be minimized, even overcome by use of the familiar hearing aids. The most common is worn over the mastoid bond behind the pinna. It picks up sound waves and transmits them through the skull to the cochlea. Sensorineural hearing loss, the most common form in the United States, occurs as a result of advancing age as well as exposure to loud noises. A survey by NGO Awaaz Foundation has shown that the noise level in silence zones is more than the permissible limit. a silence zone is an area within 100 metres of hospitals, educational institutions, religious....
Water Conservation Need For Growing Population.
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Water conservation Our ancient religious texts and epics give a good insight into the water storage and conservation systems that prevailed in those days. Over the years rising populations, growing industrialization, and expanding agriculture have pushed up the demand for water. Efforts have been made to collect water by building dams and reservoirs and digging wells; some countries have also tried to recycle and desalinate (remove salts) water. Water conservation has become the need of the day. The idea of ground water recharging by harvesting rainwater is gaining importance in many cities. In the forests, water seeps gently into the ground as vegetation breaks the fall. This groundwater in turn feeds wells, lakes, and rivers. Protecting forests means protecting water 'catchments'. In ancient India, people believed that forests were the 'mothers' of rivers and worshipped the sources of these water bodies. ....
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