What similarities do you observe in the lives of the zabbaleen in urban Cairo and the Shipibo Indians of the Peruvian Amazon?

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What similarities do you observe in the lives of the zabbaleen in urban Cairo and the Shipibo Indians of the Peruvian Amazon? What are the underlying causes of the respective crises faced by the zabbaleen and the Shipibo?  How do demographic factors such as fertility, mortality, and migration influence human interaction with the environment in both ethnographic contexts?