Examlex
Summarize the main characteristics of each wave of environmental activism discussed in the text.
Parent Material
The underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form.
Iron Oxide
A chemical compound made of iron and oxygen, commonly found in rust and various minerals, and used in numerous industrial applications.
Soil Horizon
A layer parallel to the soil surface, whose physical characteristics differ from the layers above and beneath, often classified by distinctive features such as texture and color.
Organic Matter
Material derived from the decay of plants and animals that provides nutrients for plants and increases soil fertility.
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