What crucial aspect of construction emissions does the CIDB inventory exclude?

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The CIDB Embodied Carbon Inventory excludes carbon released from construction activities carried out on site.

The CIDB’s Embodied Carbon Inventory consolidates emission factors for construction materials and embodied carbon, but it does not attempt to cover carbon released during on-site construction activities. Those on-site emissions include fuel combustion from excavators, cranes and generators, waste disposal, temporary works, transport, services, machinery and other on-site activities, which are stated to account for 37 per cent of the construction industry’s total carbon footprint. In Malaysia, there is also no standardised quantification mechanism for any of these on-site activities.
It focuses on material embodied carbon rather than on-site activity emissions
The inventory consolidates emission factors for materials using sources such as Environmental Product Declarations from Southeast Asia, Singapore’s BECC, SIRIM, and the UK’s Inventory of Carbon and Energy. It is therefore built around embodied carbon in materials such as steel, concrete and glass rather than emissions generated by work performed at project sites. The key exclusion is the carbon released from the construction process occurring on site.
It leaves out on-site categories that make up 37 per cent of the footprint
The omitted scope covers fuel combustion from equipment such as excavators, cranes and generators, along with waste disposal and temporary works. It also excludes emissions from transport, services, machinery and other on-site activities. These on-site elements are explicitly described as accounting for 37 per cent of the construction industry’s total carbon footprint.
Malaysia lacks a standardised mechanism to quantify on-site emissions
Even where sustainability reporting exists, Malaysia is described as having no standardised quantification mechanism for on-site carbon categories. The absence of a localised, standardised protocol for on-site emissions means that on-site activity emissions are not consistently captured in a way that can be compared across firms. This contributes to variability in what different companies report as their construction carbon figures.

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What crucial aspect of construction emissions does the CIDB inventory exclude?

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