Table 1.

Principles of high-quality offsets

CriteriaDescription of criteriaConcerns
Real and measurableOffset GHG reductions are material, quantifiable and traceableOffsets may be fictitious or inaccurate
AdditionalGHG reductions would not have happened without this projectReductions were already in the works, so there is no overall lowering of GHGs
TransparentEntities are not trying to keep anything secretInformation may be hard to find or difficult to understand
PermanentOffsets are not temporary or fleetingOffset projects will experience some form of reversal, such as from fire
Verified and registeredFormalities are conducted by independent, reputable third partiesOffset projects may be informal and unverifiable
Accounts for leakageBoundaries, scope, time and technical reasons for potential leaksIf there is leakage outside the project, overall reductions may not occur
EnforceableOffsets are backed by legal contracts with sanctions for lack of complianceVolunteer transactions (those without enforcement) can change over time
Not double countedOffsets are only claimed by one entityThere will be more than one entity counting the GHG reduction
RetiredOnce purchased, offsets are taken off the marketOffsets will enter back into circulation, perhaps allowing for double counting across time
Co-benefitsOffset projects create positive educational, social, economic development and resiliencyCarbon-centric projects may have unintentional negative tradeoffs and miss opportunities for public good
Source: Extended from Second Nature (2016) 

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