Waste Disposal

Explore how the two most popular methods of waste disposal incineration and landfills work, their environmental impacts, and how cities decide between both systems.

Waste doesn’t disappear when you throw it away. It’s burned or buried, and both choices come with real consequences. In this challenge, you’ll learn how incineration and landfills actually work, what they release into the environment, why different countries rely on one system over the other, and how waste reduction and smarter material use can shift the whole picture. By the end, you’ll understand the full journey of your waste and how your own habits can meaningfully reduce pressure on these systems.

Learning Goals

1 Understand how incineration transforms waste and produces usable energy

2 Recognize how engineered landfills store waste and generate methane

3 Compare environmental impacts of burning waste versus burying it

4 Identify long-term pollution risks from emissions, leachate, and landfill gases

5 Explain why countries choose different waste-management systems

6 Evaluate how waste reduction and recycling reduce pressure on both systems.

How We Handle Waste

You’ll explore what happens to waste after it leaves your bin, comparing the two dominant systems the world relies on: incineration and landfilling. You’ll see how each method works, what happens to the material during the process, and why different countries make different choices. This module gives you the foundation you need before looking at environmental impacts later in the challenge.

How Incinerating Waste Works

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How Landfills Work

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The Impact Behind Disposal Choices

You explore why different countries rely on incineration or landfilling and how their decisions shape environmental outcomes. You also learn how smarter design, reuse, and waste reduction can shrink the need for both disposal systems and move society toward a cleaner, lower-waste future.

Why Countries Choose Incineration or Landfilling

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Building a Future With Less Waste

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3 B3TR

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