Leaving Certificate Technology – Materials Practice Test 2026 - Free Practice Questions and Study Guide

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Why is burning plastics discouraged and what are safer disposal options?

Recycling is always safer than burning.

Burning plastics releases toxic gases.

Waste-to-energy has no emissions controls.

Burning plastics is discouraged because it releases toxic gases; safer disposal options include recycling, mechanical/chemical recycling, and waste-to-energy with proper emissions control.

Burning plastics is discouraged because it can release toxic gases, especially dioxins and furans, when chlorine-containing plastics (like PVC) burn or when combustion isn’t complete. These pollutants are harmful to health and the environment, and they can travel through air and water and accumulate in living systems. In addition, burning can produce particulate matter and other harmful emissions if emission controls aren’t in place.

Safer disposal options include recycling, which keeps plastics in use by processing them into new products (mechanical recycling for most plastics). Chemical recycling can break polymers back into useful chemicals or monomers for new plastics. Waste-to-energy can be an option if it’s done in facilities with strong emissions controls, capturing pollutants with filtering and scrubbing technologies. Prioritizing recycling and material recovery helps reduce pollution and preserves resources.