Students learn about fossil fuels and renewable energy sources to help them decide which type of energy should be used to power a city’s electric grid in the coming decades. In this interactive lesson, students watch videos adapted from NOVA: Treasures of the Earth: Power and analyze data provided in graphs and maps concerning the availability, cost, reliability, and environmental impact of different energy sources. They use what they learn from the lesson materials to make an evidence-based argument that supports their decision.