|  You might not realize that as our world population grows, the 
			  population of other species is threaten. When we build more houses 
			  along the sea shore, or clear rain forests for farming, or harvest 
			  the fish from river beds without replenishing, we set into motion 
			  events that can threaten the survival of other species. This threat, 
			  if not addressed, can mean the extinction of some species of wildlife. 
			  Why does our growth hurt the survival of other species?   When we clear land or change the natural landscape by the building 
			  of houses and such, we destroy the natural habitats of the wildlife 
			  who were living there. We destroy the places where they nest and 
			  sleep. We destroy the places where they go to find food and water. 
			  We destroy the safe places for them to have and raise their young. 
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