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Green Power (Library Binding)
9780778728573Crabtree Publishing CompanyMSRP: $30.60$28.76Imagine living in a pollution- free city! The world needs power but the Earth's current sources of energy are destroying our environment. Our future depends on environmentally friendly energy and... -
Star Spotters: Telescopes and Observatories (Library Binding)
9780778737254Crabtree Publishing CompanyMSRP: $30.60$28.76In orbit and on the ground, star spotters are the 'eyes' we use to explore deep into space. Star Spotters: Telescopes and Observatories answers questions such as: What is the most powerful telescope?...