I do know a little about developing countries in W Africa. My husband has 15 brothers and sisters (father had three wives). There are 60 of the extended family living in a shanty compound. Nobody has a car (the very idea!) They eat stuff cultivated in their country (maize, manioc, kasava), with a few imports such as rice. They 'consume' hardly anything. All their clothes are merely bits of cloth handed down from one to another. They have hardly any possessions. They walk everywhere, carrying water, market produce and charcoal on their heads. They sleep on a rush mat on the floor. This huge family could be said to have produced far too many children, but sadly many of them die young. The remaining ones look after their old people tenderly. I consider them as very low-consuming compared to the affluent west. They have no plastic, petrol, cars, vehicles, chemicals, cleaning products, detergents, toiletries, furniture and so on. I would say their impact on the planet is quite modest.