How can soil degradation and erosion lead to food scarcity for substance farmers?

Which of the following situations is most likely to arise when a crowded city is unable to provide its residents with sufficient sanitation?

What is a relative location for alburqurque new mexico

1. from the point of view of the indigenous people what is the primary difference between the north and south american colonization efforts by european countries? 2. what is the cultural divide between latin america and north america?