The oldest and most important source of power for our planet is the Sun. This amazing new book tells why solar power is becoming a very real replacement for our current energy sources. Detailed images feature different types of solar collectors, solar thermal plants, and solar cells, and help explain how they are used. Special case studies identify areas where solar power is already in use around the world. Topics include - a timeline and history of solar energy use - detailed diagrams that show how solar technologies work - the experiences of people who have taken themselves "off the grid" Teacher's guide available.