Global Challenges and Sustainability · Semester 2

Waste Management & Circular Economy

Reducing waste, promoting recycling, and the journey to becoming a 'Zero Waste Nation' through circular economy principles.

About This Topic

As a small island with a growing population, Singapore faces a massive challenge in managing its waste. This topic explores the journey of our trash from our bins to the waste-to-energy plants and finally to Semakau Landfill. Students learn about the 'Circular Economy', a system where waste is minimized and resources are reused, and Singapore's goal to become a 'Zero Waste Nation' by reducing, reusing, and recycling.

For P6 students, this topic is about changing habits. It connects to the MOE syllabus on 'Global Challenges and Sustainability.' This topic comes alive when students can physically model the patterns of 'Waste Flow' through waste audits and collaborative projects to design 'Zero Waste' solutions for their school.

Active Learning Ideas

Inquiry Circle: The Waste Audit

Groups examine the 'trash' from their classroom or canteen (safely!) and categorize it into 'Recyclable,' 'Compostable,' and 'Landfill.' They then brainstorm three ways to reduce the 'Landfill' portion by changing their habits.

⏱ 45 min·Small Groups

Generate mission

Simulation Game: The Shrinking Landfill

Use a container to represent Semakau Landfill. Students add 'trash' (blocks) for each day of a city's life. They then see how 'recycling' and 'incineration' (removing blocks) can make the landfill last much longer, illustrating the urgency of waste management.

⏱ 40 min·Small Groups

Generate mission

Think-Pair-Share: What is a Circular Economy?

Students discuss the difference between 'Take-Make-Dispose' and 'Reduce-Reuse-Recycle.' They share their ideas to understand that in a circular economy, 'waste' is seen as a resource for making new things.

⏱ 25 min·Pairs

Generate mission

Watch Out for These Misconceptions

Common Misconception

Students may think that everything they put in the blue recycling bin actually gets recycled.

What to Teach Instead

Contamination (like food waste on paper) can ruin a whole batch of recycling. A 'Recycling Detective' activity can help students learn the 'Wash and Dry' rule and what can and cannot be recycled in Singapore.

Common Misconception

Pupils often believe that Semakau Landfill will last forever.

What to Teach Instead

At our current rate of waste, it is expected to be full by 2035. Using a 'Countdown' simulation can help students feel the urgency of reducing waste to protect our only landfill.

Frequently Asked Questions

What happens to our trash at Semakau Landfill?

Most of Singapore's non-recyclable waste is first burned in waste-to-energy plants, which reduces its volume by 90% and produces electricity. The remaining ash is then shipped to Semakau Landfill, an offshore island where it is buried in lined pits. The island is carefully managed to protect the surrounding marine life and mangroves.

What is a 'circular economy'?

A circular economy is a system where we try to keep resources in use for as long as possible. Instead of just throwing things away, we design products to be reused, repaired, or recycled. This reduces the need for new raw materials and minimizes waste, helping the environment and the economy.

How can active learning help students become 'Zero Waste' advocates?

Active learning strategies like 'Waste Audits' and 'Upcycling Challenges' turn the abstract problem of waste into a practical, creative task. When students see the physical volume of waste they produce and then work together to reduce it, they gain a sense of agency. This moves the lesson from 'don't litter' to 'how can I redesign my life to be sustainable?'

How can we reduce food waste in Singapore?

We can reduce food waste by only buying what we need, ordering the right amount at the hawker center, and using 'ugly' fruits and vegetables that are still perfectly good to eat. Some schools and communities also use 'food digesters' to turn food scraps into compost for gardens.

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