This unit was designed to develop mathematical applications in relation to a community resource issue. It should both motivate mathematics learning and provide meaningful problems for reinforcing understanding of mathematics content and skills, including ratios and percentages, linear equations, exponential functions, graphing, and the reading and interpretation of graphs and tables. A discussion section is intended to give the teacher a good understanding of the issues, present available important data, and elicit mathematics problems. The mathematics is introduced implicitly with diagrams, tables, and graphs embodied in the discussion. The second section contains real-life mathematics problems involving natural gas. Appendices present equivalent measures, additional information on pricing gas, and problem solutions. (MNS)