Often used to describe large-scale planting for positive environmental impact. It implies deliberate, planned activity. The city's project to afforest the park reduces urban heat.
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Specific Change
Used when specifically turning non-forest land into forest, not just planting a few trees. The barren plateau was completely transformed as they began to afforest it.
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Positive Context
Carries a positive connotation, suggesting improvement of land and environment. After they decided to afforest the wasteland, biodiversity increased significantly.