INFORMATIVE SPEECH

Honorable Mr. Dadang Iskandar and my lovely friends
Good afternoon
First of all I want to give thanks to Allah SWT because give me chance to stand in here
Okay let’s me introduce my self
My name Dani Kurniawan
You can call me with Dani
I will tell you about Water Pollution
Let’s begin


Water Pollution

Water pollution is any chemical, physical or biological change in the quality of water that has a harmful effect on any living thing that drinks or uses or lives in it. When humans drink polluted water it often has serious effects on their health. Water pollution is not just something that big chemical plants make. We all need to look at our impacts and try to make improvements. Make sure you use biodegradable products made with natural products and make sure all waste is disposed of properly.
There are several classes of water pollutants; The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste. A second category of water pollutants is oxygen-demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria. When large populations of decomposing bacteria are converting these wastes it can deplete oxygen levels in the water. This causes other organisms in the water, such as fish, to die. A third class of water pollutants is water-soluble inorganic pollutants, such as acids, salts and toxic metals. Large quantities of these compounds will make water unfit to drink and will cause the death of aquatic life.
Another class of water pollutants are nutrients; they are water-soluble nitrates and phosphates that cause excessive growth of algae and other water plants, which deplete the water's oxygen supply. This kills fish and, when found in drinking water, can kill young children. Water can also be polluted by a number of organic compounds such as oil, plastics and pesticides, which are harmful to humans and all plants and animals in the water. A very dangerous category is suspended sediment, because it causes depletion in the water's light absorption and the particles spread dangerous compounds such as pesticides through the water. Finally, water-soluble radioactive compounds can cause cancer, birth defects and genetic damage and are thus very dangerous water pollutants.
My recommendations is to overcome this water contamination, better every house have some plants or trees in the future water that flow or diffuse in land or ground, can be filtered by earth and water even also can be kept by tree reffered. In every house must have grass yard and minimization the usage of cement or asphalt to arrange in layers land or ground. And throw away garbage and also waste promiscuously in water stream either that moat or river. For industry community don’t throw away their waste to river stream because will destroy ecosystem in and its surroundings.


That’s all
Thank you for your attention