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Environmental projects are often judged by quick results, but living systems rarely follow a convenient timetable. The (17) .......... of a stream bank, for example, may take years even after the source of damage has been removed.
What matters is not only whether plants return but whether the area develops (18) .......... when weather becomes extreme.
Materials used nearby should be (19) .......... wherever possible, so that routine maintenance does not create a new waste problem.
Some changes, such as the loss of deep soil, may be (20) .......... once they pass a certain point.
For this reason, progress should be measured (21) .......... and compared across several seasons.
Researchers also track animal (22) .........., since a site is not thriving if it cannot support movement between habitats.
A sound plan considers the wider (23) .......... context rather than treating one patch of land in isolation.
Even careful work cannot eliminate every source of (24) .........., but it can reduce harm and make future decisions better informed.