IMPACT World+
Version 2.2.1
A globally regionalized method for life cycle impact assessment (LCIA).
NOTICE: There is a mistake in version 2.2 and it should NOT BE USED. This has been corrected in version 2.2.1.
Table of Contents
BETA INDICATORS: Some new indicators have been included in this version as beta and we are looking for community feedback before fully implementing them.
New indicators
Resource dissipation indicators (beta)
Two new resource indicators built around resource dissipation rather than extraction have been introduced. “Adaptation to resources services loss” measures the extra energy needed to extract resources as a result of dissipation and “Resources services deficit” looks at potential future deficits over the next 100 years. They assess the dissipation of both mineral resources and fossil and nuclear energy resources. A key limitation of these new indicators is that current LCI datasets don’t report dissipation flows directly, so emissions are used as proxies which may result in underestimated scores. To more effectively characterize the specific dissipation of resources associated with their system, the practitioner will need to adapt the inventory to include specific dissipative flows instead of generic flows from average activities, such as end-of-life processes from generic background LCI databases.
While these indicators better represent the associated area of protection, they are quite new and their use and analysis is different than the previous indicators for this category and so they are being introduced as beta indicators alongside the existing indicators, “Mineral resource use” and “Fossil and nuclear energy use”, while community feedback is assessed. If you have feedback on these indicators, please contact us.
Updated indicators
Climate change, ecosystem quality
Both the fate and effect factors were overhauled. The fate factor now reflects IPCC AR6 AGTP (October 2025 erratum) values, and the effect factor now incorporates marine species alongside terrestrial ones, splitting the indicator into separate terrestrial and marine damage components. The additional characterization of marine species caused a marked increase in this indicator compared to previous versions.
Since the data and methods for the marine ecosystem indicators are quite new, they have been tagged as beta. If you have feedback on these indicators, please contact us.
Climate change, human health
These CFs were updated with the AR6 fate factor resulting in a slight overall decrease.
Land use
These CFs were updated to use local characterization factors from Chaudhary (2015) instead of de Baan (2012), with improved geographic coverage across all Ecoinvent regions.
Acidification and eutrophication
Maps were updated to cover more Ecoinvent geographies including US states and Australian regions, with minor changes to global values but significant corrections to some regional CFs.
Physical effects on biota (renamed)
This category was renamed from “Plastics physical effects on biota” and now includes characterization factors for non-plastic fibers: cotton, linen, viscose, rayon, lyocell and modal.
Corrections
- Water scarcity was using a December global value instead of the annual one.
- Fisheries bycatch flows were linked to the wrong compartment.
- Marine and terrestrial ecotoxicity were missing “unspecified” sub-compartment equivalents, causing underestimation.
- CO₂ from land transformation and peat oxidation was incorrectly treated as CO₂ from fossil sources in the resource indicator.
Precise report of changes
The precise reports of changes (flow by flow), for all software and database for which we provide an IW+ version, are available in the Documentation section.
Note that those reports depend on the database/software combination as software typically do not cover the same elementary flows and use different names.