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IPCC
Phenomena whereby the reduction in emissions (relative to a baseline) in a jurisdiction/sector associated with the implementation of mitigation policy is offset to some degree by an increase outside the jurisdiction/sector through induced changes in consumption, production, prices, land use and/or trade across the jurisdictions/sectors. Leakage can occur at a number of levels, be it a project, state, province, nation, or world region. In the context of Carbon Dioxide Capture and Storage (CCS), 'CO₂ leakage' refers to the escape of injected carbon dioxide (CO₂) from the storage location and eventual release to the atmosphere. In the context of other substances, the term is used more generically, such as for 'methane (CH₄) leakage' (e.g., from fossil fuel extraction activities), and 'hydrofluorocarbon (HFC) leakage' (e.g., from refrigeration and air-conditioning systems).
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CDM
"For a CDM project activity (non-A/R) or PoA (non-A/R), the net change of anthropogenic emissions by sources of GHGs which occurs outside the project boundary, and which is measurable and attributable to the CDM project activity or PoA, as applicable. For an A/R CDM project activity or A/R PoA, the increase in GHG emissions by sources or decrease in carbon stock in carbon pools which occurs outside the boundary of the A/R CDM project activity or A/R PoA, as applicable, which is measurable and attributable to the A/R CDM project activity or A/R PoA, as applicable."
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＃相關名詞
指事業及各級政府執行溫室氣體自願減量專案、本法修正施行前執行溫室氣體排放額度抵換專案（以下簡稱抵換專案）、溫室氣體減量先期專案（以下簡稱先期專案）取得之額度。