Acasa | Trimite referat | Cere referat | Contact

Referat Pollution

Descriere referat:

~POLLUTION~ Pollution is everyvere and the people are the ones who caused it! AIR POLLUTION Most of the air pollution is visible under the form of smoke and gas. Smoke is a combination of gases and chemicals and it can become more toxic under the action of powerfull sun, because of a chemical reaction made by light. It is very unhealthy. The increase of astm cases are the proof of the effect of air pollution. It`s also very bad for the environment. If there are chemical substances in the air, they will fall with the rain causing the "acid rain", witch destroies the environment. Chemicals can be absorbed by plants in the polluted area . Polluting the air by burning broun coal at a power station is a real big danger. In 1980, the chemical complex from Bitterfield, the bigest in Europe was unloading daily in the Mulde river approximately 200.000 m of residue. Substances used in sprays and for cooling are destroing the ozon lear that protectes us from the ultraviolette rays. In many countries these substances have been removed and even forbidden. SOIL POLLUTION The soil pollution is the most difficultto measure and control and it`s harder to clean than water or air. The land is used to deposite rubbish and wastes. The mud contains nutritive substances, like nitrogen and phosphor, but it can have many unwanted toxic metales. Rubbish is discomposed in contact with soil. But many material residue don`t dissapear easely.For example petrol. That`s why many countries are monitoring dangerous substances on land and they verify the level of these substances in vegetal tishue, animals and human. In this picture the pollution level is 200-300 grams of crude oil per one kilogram of dry soil. Rubbish depositing places must be carefully administrated for that the earth doesen`t contain diseases. WATER POLLUTION Earth is the" watery planet". Viewed from space it is predominatly blue, because 74% of its surface is covered by water. Oceans contain 97% of the earth's water while the remaining 3% is classified as freshwater. 77% of this surface freshwater is stored as ice and 22% as groundwater and soil moisture. The remaining freshwater, making up less than 1% of the world total, is contained in lakes, rivers, and wetlands. [pic] Water has unique, physical, and chemical properties: you can freeze it, melt it, evaporate it, heat it, and combine it. All life depends on water. It makes up two thirds of the human body. A person may be able to live without food for more than a month, but can only live without water for a few days. Water is a precious resource. Even though around 71% of the Earth's surface is covered by water, most of this is salt water. Water is the most important and probably the most widely known substance on the Earth.

Alte referate din materia: Engleza

Nr.	Nume referat	Hits
1	qJGCUSlCiWtH	218
2	txplxk@uxkhef.com	312
3	xjzszq@zmxrsz.com	363
4	cbiezv@szpfmh.com	577
5	RMNHoUUWI	558
6	THE BLACK CHURCH IN BRASOV	860
7	TV advertisements	959
8	Tabel cu vb. neregulate	0
9	Teen suicide	666
10	Tennis	903
11	Tess of the d'Urbervilles	802
12	Tess of the d'urbervilles	802
13	Test Paper	792
14	The renaissance and impressionism	731
15	The Adventures of Huckleberry Finn	745
16	The Bermuda Triangle	756
17	The Devil's Disciple - George Bernard Shaw	719
18	The English translation of The Bible	723
19	The History of The Great British Museum	777
20	The Pyramids of Egypt	764
21	The Reforms of Caesar	599
22	The Subjunctive	1186
23	The Survival of Tragedy	547
24	The adjective	590
25	The beatles	612

Acasa Trimite referat Cere referat Adauga la favorite Seteaza ca homepage Contact libertateailuziei Trailere Filme Filme Noi Jocuri Online Jocuri Barbie Jocuri pentru Copii GameBox.ro Make Money Bucuresti regim hotelier

Referat Pollution

Pollution

Categorie: Referate Engleza

Referat downloadat de: 134 ori.

Descriere referat:

Alte referate din materia: Engleza