Waste Hierarchy
The waste hierarchy is a framework that ranks waste management options by environmental preference, from most to least desirable: prevention, reuse, recycling, recovery, and disposal.
What is Waste Hierarchy?
The waste hierarchy is a foundational principle of waste management and circular economy policy. It prioritises actions that minimise environmental impact: prevent waste from being created, reuse items where possible, recycle materials, recover energy from waste, and only as a last resort, dispose of waste in landfill.
From a carbon accounting perspective, the waste hierarchy directly affects Scope 3 Category 5 (Waste Generated in Operations) and Category 12 (End-of-Life Treatment of Sold Products). Moving waste up the hierarchy — from landfill to recycling, or from recycling to prevention — reduces the associated emissions. Landfill produces the highest emissions (particularly methane from organic waste decomposition), while prevention eliminates waste emissions entirely.
In the UK, the waste hierarchy is enshrined in the Waste (England and Wales) Regulations 2011. WRAP (the Waste and Resources Action Programme) provides guidance and tools for organisations looking to apply the hierarchy. The Environment Act 2021 introduced Extended Producer Responsibility and deposit return schemes that further encourage waste prevention and recycling.
Practical Examples
A food service company applies the waste hierarchy by first reducing food waste through better stock management, then composting unavoidable food waste, and only sending non-compostable residuals to energy recovery.
A manufacturer redesigns its packaging to be 100% recyclable, moving from mixed-material packaging (destined for incineration) to mono-material packaging (recyclable), reducing Category 12 emissions.
An office introduces a comprehensive waste segregation programme, diverting 85% of waste from landfill to recycling and reducing Category 5 emissions by 70%.
How Climatise Helps
Climatise tracks waste by type and disposal method, showing the emissions impact of different waste management approaches and quantifying the benefit of moving waste up the hierarchy.
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