convert waste into reusable material
the exchange of raw materials and goods between buyers and sellers across the borders of...
pressure exerted by the mass of the atmosphere; the weight of the atmosphere on Earth's surface...
immature soil with unclear profiles (no distinct layers)
(also called a bell-shaped pyramid) a population pyramid with a relatively narrow base and broad...
a fault created by tension forces and in which the roof of the fault is the part that moves down...
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