It snatched up the protection of a strong military and the hope for a stable government and the few Roman citizens left behind had to suddenly fend for themselves against barbarian invaders
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Answer:
Limits food, medicine production
As the world's population continues to grow, competition for land and water resources to produce food, energy and housing is fierce. We need a wide variety of animal and plant life for adequate human nutrition so that populations are neither malnourished nor obese.
Explanation:
By lowering trade barriers....I think. Sorry if it's wrong