Following a student conducting research, the reader learns about water power as an energy source. This exciting title includes how humans used water power in the past, how we use energy from water power today, and how we may use it in the future.
Following a student interviewing experts about biofuels, this exciting title teaches readers about biofuels as an energy source. The book covers biofuels' history, how they are used today, and innovative ways we may use biofuels in the future.