| Habitat loss causes the greatest threat to species. The world's forests, plains, lakes, and other habitats continue to disappear as they are harvested for human consumption and cleared to make way for agriculture, housing, roads, pipelines and the other industrial development. Without a plan to create terrestrial and marine protected areas important ecological habitats will continue to be lost..
When an ecosystem has been dramatically changed by human activities such as agriculture, oil and gas exploration, commercial development or water diversion it may no longer be able to provide the food, water, cover, and places to raise young.
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