1. Environment: All the biotic and aboitic factors that can affect a living organism in a place where they live.
2. Erosion: The wearing away of soil surface by the mechanical and chemical weathering of rocks by the agents of denudation.
3. Denudation: The removal of the plants and trees that cover an area of land.
4. Weathering: Chemical or physical breakdown of the minerals in the rock.
5. Deforestation: The act of cutting down or burning the trees in an area.
6. Afforestation: The process of planting trees in an area of land in order to form a forest.
7 Pollution: This is the introduction of substances called pollutants into habitats (soil water, and the atmosphere). The introduction by man into the environment of substances or energy liable to cause hazard to human health, harm to living sources and ecological system, damage to structure or amenity, or interference with legitimate uses of the environment.
8 Land: The surface of the earth that is where human, animals and natural vegetation are found.
9 Erode: To wear away.
10 Menace: Danger.
11 Metropolis: The main commercial, industrial part of a city as distinct from the suburbs.
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