Category: MA VIDEO

90 % of water is available in nature is in frozen form of snow, 10% of fresh water is for human being. At any place on Earth, deterioration of water due to inclusion of undesirable outside element in water deposit is called water pollution; oceanic water is saline in nature which is being used by human being directly. Types of water pollution on the bases of water and pollutants, first is surface water pollution second is Oceanic water pollution, third is underground water pollution and other one is Natural source, human source and efficient. Surface water is polluted when mineral mix with it like, mercury, lead, zinc. Oceanic water is polluted when disposal of waste poisonous chemical like mercury are the main waste material among others. Directly affect the biotic life in seas coral, fish etc. Ground water is polluted when agriculture waste, Industrial waste, rural and urban waste disposal mix with it.

CBD is American word and the central Business District is regarded as the organizing centre about which the rest of the city is structured. This is the place where everyone can communicate easily, commercial work is developed and non- government work is done here. If the place is removed then there will not the importance of city. Value of land is very high. At this all the good mode of transportation took place, all the commercial activities took place, each work have their own group like cloth market, vegetable market, this place is easily approachable, CBD is the core of a city. Characterized by the maximum frication of space, tallest building highest land value and greatest concentration of pedestrian and vehicular traffic.