Answer:
We can use freshwater sustainable by reducing water waste. This can be done by raising the price of the water. Population also needs to be controlled, it is growing at a fast pace. Aquifers, forests and other ecosystem shall be preserved and stored for future use. There are various ways in which water can be conserved. Freshwater use shall be decreased by recycling water and using it over again. Usage of freshwater in irrigation shall be reduced. Also freshwater waste can be reduced in households and industries. Water should be used in less quantity to reduce the water waste.
Water pollution can be controlled in many ways. It has point and non-point source of pollution. Almost all the pollutants have harmful effects that contaminate water and harmful health effects to living beings. Though streams and groundwater have their own mechanism to cleanse itself but at present streams are over polluted so human actions are require to clean it. Recycle, reduce and reuse are the ways to conserve or prevent the resources. Using of energy efficient appliances and treating wastes before releasing them into the lakes, rivers etc. will help in controlling pollution level. Also strict laws shall be made for pollution control and violators shall be punished.
Answer:
Water purification methods are used at home because the water that reaches the households is not completely pure. There are several types of water filters used at home i.e. Filters, reverse osmosis units, distillers and softeners. In olden days, the water was purified by boiling which used to kill germs. But as the technology has advanced, the germs and bacteria's have also become very powerful. So only boiling of water is not enough.
1. Filters: Dirt, sediments and odors are removed by the filters. Filters use the adsorption and mechanical filters to purify water. Various types of filters are present in the market. For e.g. Carbon filter, pour through, faucet mount, line bypass, Fiber filters etc. All these filters have some special functions for killing different types of germs
2. Reverse osmosis: It is quite an expensive purifier. In helps in removing inorganic germs or chemicals from the water. It treats water only for drinking and cooking. Its price ranges from $200 to $1000.
It is an alternative to bottled water. It gives pure water. It kills all kinds of organic germs.
Water treatment produces purified, cleared and odorless water. It reduces nitrates, phosphates etc present in the water that prevents liver, eye damage and skin irritation.
Answer:
(a)
Calculate the per capita water consumption per day in 2005.
Substitute
for total consumption of water and
for total population in 2005.
Hence the use of per capita water is
Calculate the per capita water consumption per day in 2025
Substitute
for total consumption of water and
for total population in 2005.
Hence the use of per capita water in 2025 is
(b)
Calculate the per capita water consumption per year in 2005.
Substitute
for total consumption of water and
for total population in 2005.
Hence the use of per capita water consume in a year 2005 is
Calculate the per capita water consumption per year in 2025
Substitute
for total consumption of water and
for total population in 2005.
Hence the use of per capita water per year in 2025 is