Today, i'd like to give all of you a presentation about water pollution - one of the most popular topics about the environment.
Water is important not only for human but also for every creature in the Earth., Without water we will slowly be withered like leaves in winter. But have we ever cared about water? Water is seriously polluted by our careless living.
i want to show you the main reason of water pollution. they are:
-first of all is the Sewage and waste water which is produced by Domestic households, industrial and agricultural practices. There are about 7 billion people in the world so treating seawage is a big priority that many countries have to face.
- second is the industrial waste. Industry is a huge source of water pollution which produces extremely harmful pollutants such as lead, mercury, nitrates, phosphates, oils and petrochemicals, Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans.-
- thirdly, i'd like to talk about the marine dumping. People throw dump like cardboard, newspaper, Foam, plastic bags and glass which takes long times to degrade.
- And last but not least are Shipping travel, drains, dumping and underground storage leakages that cause oil pollution and accidentally throw petroleum, oil and waste water into the lakes, rivers and ocean.
now, i want to tell you the danger of water pollution: All types of water pollution are harmful to humans and animals. Water pollution might not damage our health right away but can be harmful after a long of exposure. One of the most serious problems of water pollution is the asen pollution. People who drink water that contains asen can get cancer, which is usually skin cancer. Moreover, dirty water can destroy slowly the house of fishs and water animals, which probably causes some harmful effect to the ecological balance. It even makes the view become ugly and dirty. Water pollution can be damaging to the economy as it can be expensive to treat and prevent contamination. Waste that does not break down quickly accumulates in the Earth’s waters and eventually makes its way to the oceans.
2/3 area of the Earth is water. It is one of the most important natural resources. But it is getting dirtier every hour. What can we do? This is our ideas to protect clean water:
+ do not throw rubbish into rivers,lakes,oceans.
+ waste water must be treated being discharged into rivers
+ factories have to treat wastewater before discharging into rivers
+ do not pollute the soil as waste will leach into groundwater
+ do not waste to mach CO2 because the gas will create acid rain and pollute the water
+ use of clean energy
+ join some volunteer activities to clean the seashore, lakes, rivers, ects..
+ join in some propaganda activities.
+ children should study about pollution and help cleaning beachs,streets.ects..
p/s: nhà chùa làm rồi nên k thuyết trình đâu nhá, đề nghị bạn Ly nói