Lesson Plan - Get It!
Did you know that 75% (three quarters) of the earth's surface is made up of water? This includes oceans, rivers, ponds, lakes, and streams. Our bodies are also made up of about 70% water! To live and survive, all living things must have clean water!
Because every living thing needs water to survive, it is very important that we keep our oceans, lakes, rivers, ponds, and streams clean.
Unfortunately, water is often contaminated by trash, chemicals, and other substances. This is called water pollution. When water is dirty or polluted, it affects what we drink and the plants and animals that live in the water.
Here are some causes of water pollution:
- Pollution from industries Many industries and factories make products using many different chemicals. Some of these chemicals include sulphur, asbestos, lead, nitrates, and phosphates. These chemicals often end up in the water supply, causing great harm to the water system, making the water dangerous to drink.
- Oil Spills Often when oil is being refined or shipped, run-off and spills occur. The oil forms a thick layer on the surface of the water that blocks the sunlight from plants that live in the water, often killing them. Oil spills in water also harm fish and other marine life, too.
- Fertilizers The fertilizers that we use to help our crops grow can be harmful if the fertilizer finds its way into our water supply, especially our groundwater. This can cause the water to be filled with green algae that depletes the oxygen from the water. This can harm and even kill plants and animals that live in the water.
- Ocean dumping Think of all the trash we make each day: paper, food containers, and other things we throw away. In many parts of the world, countries throw their trash into the oceans. This makes the oceans unclean, and can make it difficult for marine life to live and grow safely.
Watch this quick video on Water Pollution for Kids: