A discussion of resources makes an excellent capstone for this textbook, as most major topics that have been discussed previously relate to the consumption of resources in some way. Global population increase means a greater demand for resources. Job opportunities in fossil fuel mining and drilling are a significant pull factor for migration in many countries where fossil fuel extraction is an important part of the economy. Cultures, and their associated political and economic systems and settlements, affect and are affected by the availability of resources and how resources are used in a country. For example, as discussed in Ch. 9, the availability of coal in the United Kingdom helped bring about the industrial revolution in that country. Furthermore, as developing countries modernize, their energy needs for transportation and electricity grow, and there is a continued increase in the demand for such energy sources as fossil fuels.