- Greet the learners.
- Remind them that in the previous lesson, they learnt about water pollution. Can they remember what water pollution is?
Answer: Water pollution happens when pollutants (insoluble substances, soluble substances and living germs) are released into water bodies (e.g. rivers, oceans, dams, ponds and wetlands) without enough treatment to get rid of harmful compounds. Humans (people) are the main cause of water pollution.
- What are the 3 types of things that pollute our water and give examples.
Answers should include:
- Insoluble pollutants, e.g. oil, plastic packets, toilet waste
- Soluble pollutants: g. soap, poison
- Living germs: g. bacteria in toilet waste
- What can we do to keep our water systems clean?
Answers can include:
- We should stop throwing plastic bags and bottles into our rivers, dams and oceans.
- We should make sure that our human waste (sewerage) is disposed of properly.
- We should stop using fertilizers and insecticides that are poisonous chemicals(rather use eco-friendly products)
- Tell the learners that humans are mostly the cause of pollution, e.g. ships that leak oil; businesses and factories that dump waste into rivers (mining and chemical factories).
- Nature has its own way of cleaning polluted water. Can they guess what this is?
“The video shows how wetlands, as part of a system of rivers, creeks and lakes, help watersheds maintain good health. Wetlands help watersheds to improve water quality and biodiversity. They help regulate water flow which reduces flooding impacts, and also collects sediment and filters pollutants. The best way to maintain healthy watersheds is by protecting and restoring wetlands, and by reducing what goes into the water, such as excess nutrients and extra sediment.”
The video tells the story about the importance of wetlands for human beings and issues that these most precious resources are facing.