Ages 9 to 12 years. In this important new book, children will discover not only what hydrogen is, but also how this simple element can create clean energy, as well exploring it's past dealings with hot air balloons and airships, its present, space shuttles and fuel cells.

שם הספר
Native North American Wisdom and Gifts (Native Nations of North America)
Generating Wind Power (Energy Revolution)
Biomass: Fueling Change (Energy Revolution)
Harnessing Power from the Sun (Energy Revolution)