Valley glaciers are formed when a glacier travels across and down a slope, carving the valley by the action of scouring.
Three important resources include energy, mineral, and timber.
Energy (natural gas, crude oil, crude bitumen (oil sands) and coal)
Mineral (gold-silver, nickel-copper, copper-zinc, lead-zinc, iron, molybdenum, uranium, potash and diamonds)
Natural resources are important for supporting the economy, and supporting the necessity of the citizens.
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<span>D. Overcrowding and destruction of rain forests</span>