Sustainability+Revolution+Chpt+1

This example also illustrates that we can temporarily

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nt drops. To maintain sustainability, the demand must decrease at the same rate as supply. During droughts communities usually accomplish this through water conservation efforts or by temporarily drawing on nonrenewable supplies such as deep groundwater. This example also illustrates that we can temporarily use a renewable resource such as lake water faster than it is replenished. When we do, the lake water level drops. If we continue to withdraw water faster than it is replenished, the lake will eventually dry up. Food serves as another example. We can estimate the maximum number of people that can be fed in a specific community, given the limitations of fertile land area, annual precipitation, etc.. Yet what if a drought or flood wipes out half the crop? To increase resilience, the community could limit population to half the maximum number that they could feed in a good year. In good years the community could store the surplus food to use in lean years. When the community has the maximum number of people that can be fed in a good year,...
View Full Document

Ask a homework question - tutors are online