User talk:Bethsadavengola

THE CONDITION OF RIVERS IN THE PAST AND PRESENT
Over 97% of all the water on Earth is salty and most of the remaining 3% is frozen in the polar ice – cape. The atmosphere, rivers, lakes and underground holds less than 1% of all the freshwater and this tiny amount has to provide the freshwater and this tiny amount has to provide the freshwater needed to support the Earth’s population. Freshwater is a precious resource and the increasing pollution of our rivers and lakes is a cause for alarm. Rivers are past of the hydrological cycle. The highly evident contrast between the present and past condition of rivers is a matter of concern for all of us. During the past, people used the rivers without polluting them. They did not cause any harm to the aquatic life and other habitats of organisms associated with it. But today we exploit rivers for a variety of our needs and pollute them. Our activities pollute the rivers in many ways. Industries and factories are the main cause for the present polluted state of our rivers. Most of the factories are built near rivers and discharge harmful chemicals into the rivers. Many power plants cause thermal pollution by discharging very warm waste water into rivers. Elevated water temperature decreases O2 level and affects the ecosystem. The use of fertilizers and pesticides by farmers are highly harmful. They are washed through the soil by rain and reach the rivers. Thus it leads to entrophication and destroys plant life. People are sometimes careless and throuw rubbish things like bottles and crisp packets directly into rivers. Oil spills also cause water pollution. The polluted rivers are the main reason for several water – born diseases like jaundice, diarrhea, cholera, hepatitis etc. Most of the freshwater pollution is caused by the addition of organic material which is mainly the sewage. bacteria and other micro – organisms which feed on organic matter and leads to decrease in the O2 level which in turn affects the aquatic life. It is necessary to understand that the water we pollute can harm us in the long run. Reducing the use of chemical fertilizers is one of the best ways to clear water pollutants from our environment. Setting up sewage treatment plants is a better choice for conserving freshwater. Inspecting the septic system for every 3 – 5 years, preventing the sewage disposal into rivers and reducing the oil spills are some ways of preventing water pollution. Efforts be made to alleviate the problem of water pollution. If we strictly follow these ways, it is possible to reduce water pollution to a great extent. It is high time that we put an end to the problems cause by men. And as citizens of tomorrow, we have to conserve and preserve water not only for us but also for the coming generation. For that, we can follow the footsteps of our ancestors who have preserved almost all the natural resources of the earth in its natural state for the good of their coming generation.