Flora - A scientific term for plants, Fauna - A scientific term for animals, Arid - A place that is very dry, Desolate - A place that is very empty, Desertification - The gradual expansion of deserts to cover the land around them, Challenges - Probelms that people face, which must be overcome, Latitude - How far north or south of the equator you are, Equator - An imaginary line running around the middle of the Earth at 0O latitude, Tropic of Cancer - An imaginary line running around Earth at 23o north latitude, Tropic of Capricorn - An imaginary line running around Earth at 23o south latitude,

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