Presentation
about enviroment
Good afternoon everyone.
First , let me introduce myself. My name is Valter and I am a student of Tallinn University of Technology. I’d like to talk about
environment, its pollution and protecting. I shall only take 3
minutes of your time.
Let me begin with the word enviroment and what it means ! It means
surroundings in which people, animals and plants exist . These are the
things that we need, to be alive, but they are also many man-made
things and technical progresses that harm the nature .
Therefore we can´t live on this planet without basic components which are needed for human existence - air, water and soil .
Firstly air, which is mostly a mixture of oxygen and nitrogen.
People, animals and plants can´t live without air. Without oxygen there would be no fire . So we can see, that air is the basic condition for life on the Earth. Did you know that till 18th century people didn´t know composition of the air? They only used the knowledge of moving the air.
Turning to water which covers over 71 % of Earth´s surface.
It is also in underground and, naturally, in the air. Even clouds
consist of water steam. People, animals and plants couldn´t live
50 punkti
Autor soovib selle materjali allalaadimise eest saada 50 punkti.
~ 1 leht
Lehekülgede arv dokumendis
2009-11-10
Kuupäev, millal dokument üles laeti
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valters
Õppematerjali autor
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