Student’s name: Nur Nadirah binti Mohd Din
Faculty/ Group: Business Management (BM2223A)
Lecturer’s name: Madam Suchitra
Title: ACID RAIN
Order: Topical Order
General Purpose: To inform
Specific purpose: Acid rain is harmful to environment that it can damage everything over a period of time because it makes the living things in the environment die.
Central idea: To inform my audience about the causes, effects and what can be done to reduce of acid rain.
I. What would you do if you knew poison was falling from the sky? What would you say if you knew that we were a big part in causing the deaths of many animals, forests, and people? How would you react if I told you that this morning you contributed to atmosphere desolation?
II. Well, get ready to do, say and react because I’m going to tell you that you are, I am, and everybody contributed to acid rain, a deadly and a real accident.
III. But not all hope is lost. We can help by learn and teach about the effects on our environment from more become harmful.
IV. Based on ‘Robert Angus Smith - the scientist who first used the term acid rain - wrote:
a. "It has often been observed that the stones and bricks of buildings crumble more readily in large towns where much coal is burnt.... I was led to attribute this effect to the slow but constant action of acid rain."
V. Today I would like to inform you about the causes, effects and solution to be taken of acid rain that can affected to us and environment.
(Transition:Let’s we start with the causes of acid rain.)
I. Before that, what is acid rain? Acid rain is rain consisting of water droplets that are unusually acidic because of atmospheric pollution. Acid rain also called acid deposition. Acid deposition describes a process that is a combination of wet and dry deposition.
a. Wet deposition is any form of rain that removes acids from atmosphere and deposits them on the earth’s surface.
b. Dry deposition polluting particles and gases stick to the ground through dust and smoke when absence of rain.
Acid rain can occur via natural sources like volcanoes but it is mainly caused by the release of sulfur dioxide and nitrogen oxide during fossil fuel combustion. When these gases are discharged into the atmosphere they react with the water, oxygen, and other gases already present there to form sulfuric acid, ammonium nitrate, and nitric acid. These acids then disperse over large areas because of wind patterns and fall back to the ground as acid rain or other forms of precipitation.
(Transition : Let’s we look on the side effect of acid rain.)
II. How does acid rain affect our ecosystem?
a. Effect on human health
a. In extreme cases, high levels of acid in the air cause skin problems and eye irritations. Chemical reactions occur between acids and alkaline substances in the atmosphere to form compounds which, when inhaled, can affect human health. One of these compounds is ammonium sulphate, which is produced in large quantities during large-scale biomass burning events.
b. Effect on aquatic life
a. Most species of aquatic animals, insects, plants and micro-organisms cannot tolerate large changes in acidity and their population are reduced when acidity increases. These aquatic animals are amongst the most sensitive and they experience large decline in numbers in acid waters. Frogs and toads suffer reproduction disorders.
c. Effect on soils and forests
a. Scientists in German said that acid rain damages the waxy outer coating that protects the leaves. When this happens, it allows the acid to seep into the tree. Instead of water changing from a liquid to a gas inside the leaves, gas is taking the place of the water. This prevents the plant from taking in carbon dioxide to perform photosynthesis,...