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Where restoration is not feasible, either because it would require an extremely long time (e.g. a bog would require a few thousand years to be effectively restored), or due to the current lack of knowledge on the restoration ecology of the species or habitat type (e.g. this could be the case for limestone springs or natural alkaline fens).
Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.