Value from 2024 onwards

0.44kgCO₂e/kg

GWP100 · IPCC AR5

2024–

Default: the latest yearUnchanged on 2023

Region: United Kingdom GB
Boundary: Process emissions
Data quality: MediumRated by us, not by the source
Licence: Open · OGL v3.0

Where 0.44 comes from

Published as one number

NAEI prints this factor as a single figure, with no parts to add up.

Reporting this kilogram under the GHG Protocol

Scope 1 0.44

Gas that escapes from equipment you run is a direct emission, so it is your Scope 1.

CiteAPI

The factor, standardised

Every factor on open-climate.ai answers the same questions in the same words, whatever the publisher. Open any ⓘ for the definition.

Direct emissions › Industrial process emissions · United Kingdom · per kg · Average

Category: Direct emissions › Industrial process emissions; Browse it to compare every publisher's factors
Activity: Glass - general - Limestone; NAEI: Glass - general
Region: United KingdomGB; Not on the record; set from NAEI's coverage
Per unit: kg; Published as Megatonne; multiplied by 0.001 to serve it per kg
Data type: Average; No supplier named
Classified as: NFR / CRT inventory source category2A3

Process emissions · Excl. biogenic CO₂ · AR5

Boundary: Process emissions; NAEI: 2A3_Glass_production
GWP method: IPCC AR5, 100-year horizon; As printed by NAEI
CO₂e basis: Excl. biogenic CO₂FossilBio CH₄Land useBio CO₂GHG Protocol and IPCC inventories; All of it is CO₂
Life cycle: Upstream: not coveredProduction: partly coveredDownstream: not coveredEnd of life: not covered

Medium quality · Open licence · 1990 to now

Data quality: Medium; Rated by us, not by the source
Applies to: 2024– (2024 onwards); Reference year 2024 · a value for every year back to 1990
Origin: Printed by NAEI
Licence: Open · Open Government Licence v3.0; Free to reuse, with attribution

All values

35 values, one per year back to 1990. Every one is biogenic CO₂ and land use excluded, AR5 GWP100, so the years compare directly.

Latest0.44 2024–

Change since 19900%

2024 onwards0.44Default value

Year

Every value of Glass - general - Limestone, United Kingdom
AppliesYears	TotalkgCO₂e/kg
	0.44Default value
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44
	0.44

Default: what search and the API return when you ask for nothing specific

What this number covers

What NAEI counts in the figure for one kilogram, phase by phase.

Your record
1 kg in your records. The factor is per kg.
= 0.44

Outside this boundary

Power the unit uses
Fugitive releases

NAEI does not count any of this in the figure for one kilogram.

Gases

Basis: Excl. biogenic CO₂FossilBio CH₄Land useBio CO₂GHG Protocol and IPCC inventories

Carbon dioxide (CO₂)0.44

Each gas is converted to CO₂e with AR5 100-year warming potentials; biogenic CO₂ and land-use carbon are left out, while methane from biogenic sources is counted.

From NAEI's record to a comparable factor

NAEI publishes this factor as one record. Here is each field as printed and what open-climate.ai made of it.

NAEI fields and their standardised form
NAEI field	As printed		Served as
Name	Glass - general	→	Glass - general - Limestone
Category	Industrial Processes and Other Product Use	→	Direct emissions › Industrial process emissions
Boundary	2A3_Glass_production	→	Process emissions
Total	440	→	0.44 kgCO₂e/kg, process emissions
Unit	Megatonne	→	per kg, divided by 1,000
GWP	AR5	→	AR5, GWP100

Checks this factor passed

One value per year from 1990, no gaps, no overlaps.
Printed value divided by 1,000 to serve it per kg.
Unit, region, boundary and method mapped to fixed code lists.

How we standardise every library

About this factor

NAEI gives no description for this factor. Filed under Industrial Processes and Other Product Use.

Source and licence

Publisher: UK National Atmospheric Emissions Inventory (NAEI), compiled for Defra and DESNZ by Ricardo Energy & Environment
Library: NAEI 2026

Open the record at NAEI

Open Government Licence v3.0 Open

The values and their metadata are served in full and may be reused with credit to the publisher.

Credit it with this line(c) Crown 2026 copyright Defra and DESNZ via naei.energysecurity.gov.uk, licenced under the Open Government Licence (OGL).

A plain reading of the licence, not legal advice. The licence text prevails.

Cite this factor

(c) Crown 2026 copyright Defra and DESNZ via naei.energysecurity.gov.uk, licenced under the Open Government Licence (OGL). Normalised by open-climate.ai, https://open-climate.ai/factors/libraries/naei_uk/ (CC BY 4.0). https://open-climate.ai/factors/ef-naeiuk-glass_general_limestone-gb-kg-process_direct-873a2880/?v=efv1-70433fec1fe4c665d2891b42b782a590

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