A useful material found in the environment is called a(n)

This is a resource that can be replaced

Most second-level economic activity is

The cutting down of trees can result in

This is the name for the technology that builds dams, canals, roads, and bridges.

This is what trees are for paper and wood.

A resource that cannot be replaced is called?

This is a technology for structures that alters the landscape.

Deforestation can lead to a loss of

Exhaust from cars and trucks is a source of air

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