HW-Crossword Puzzle

a grassy plain in tropical and subtropical regions, with few trees.
The process by which land becomes a desert.
The destruction of forest to make land available for other's.
A shortage of water.
extreme scarcity of food.
A person having no permanent abode,and who travel from place to place to find fresh food and water.
Is farming to feed themselves and there families.
Species that are likely to become extinct.
The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
s the zone of transition in Africa between the Sahara to the north sudaian savanna to the south.
The worlds largest desert.
The tropical rainforest is a hot, moist biome found near Earth's equator.