English Essays

AIR POLLUTION Assalamualaikumwarahmatullahiwabarakatuh and a very good morning to my beloved teacher ,Mr Norhisyam ,and my fellow friend .Before I begin my speech let I introduce myself.Hello my name is Amirul Zharfan . I am from 102 class. My college number is CM131027, and my science teacher is Mr Norhisyam.Alright , Today I would like to talk about air .Dear friends,everyone know air is very important for us.As we know,it is one of basic needs for all living things in this world such as human,animal and plant.Without air, we will die because we cannot breathe.For your information , air is atmosphere. It is a clear gas in which living things live and breathe. It has indefinite shape and volume,it has no colour and smell but it has mass and weight. Air create atmosphere pressure. In fact, there are a lot type of gases in the air such as nitrogen,oxygen,argon gas,carbon dioxide, hydrogen ,neon ,helium, krypton and xenon.The most percentage of gas in the air is nitrogen which is 78% of gases in the air. Oxygen is 21% of the gas, while carbon dioxide is just 0.03%.We as living things can’t only breathe the oxygen because our body also need the mixture of nitrogen , oxygen , carbon dioxide , inert gas and others. For an example,the snorkeller can’t breathe with only the oxygen in the gas tank.There should be at least mixture of nitrogen and oxygen.This show that we need other gases in our body as well. Unfortunately, air can be polluted . It is called air pollution.Air pollution is the introduction into the atmosphere of chemicals , particulates or biological material that cause discomfort , disease , or death for human , damage other living things and organisms such as food crops