Summary and Final Tasks
Our history is thus quite clear. Life is hard if we have to do everything for ourselves. We rely on arranging for help, getting energy from outside us. As we have learned to hunt, gather and control energy, we have gained the ability to survive droughts, cold, and other problems that might have defeated us before. But, even for resources such as whales and trees that can grow back, we often over-harvest until they become scarce (or disappear entirely, as we have done to many species such as the wooly mammoths of ice-age North America). When we switched to heavy use of fossil fuels, we reduced our reliance on some of the earlier sources—we have whales and trees today because we rely on burning oil, coal and natural gas.
Reminder - Complete all of the Module 1 tasks!
You have reached the end of Module 1! Double-check the Module Roadmap table to make sure you have completed all of the activities listed there before you begin Module 2.