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Plants that get rid of mosquitoes.

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Biodiversity definitions for the environment.

32

A desert is an ecosystem where annual rainfall is 10 inches or less. Deserts are dry, inhospitable environments. They occupy over one fifth of the earth’s land.

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Land and water are in a natural ecological system are called watersheds. From the smallest to the most powerful river, the water works to shape the earth, and with it sediment and dissolved materials drain the water courses and in most cases finally to the sea.

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Effects of exhaust gases into the atmosphere.

29

Between the Arctic ice cap and the taiga of the northern temperate zone is a region of treeless plains, or tundra. Below the topsoil the ground is frozen to a depth of about 5m (16ft). This frozen soil or permafrost supports plants such as mosses and lichens, which have adapted to cold conditions.

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Article describing the importance of flora and funa.

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Facts about the giraffe.

3

"Nature made ferns for pure leaves, to see what she could do in that line," wrote the 19th century American author Henry David Thoreau. They have multiple uses and emerge with miraculous results that will touch your spirit deep within.

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Is there reason for the metamorphosis of a geologically formed dune? The formation of sand dunes is within the control of the winds which amazingly, are quite consistent in their decisions.