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Eco-Friendly Energy Is Explained. The Most Current Information Is Provided While Establishing The Understanding That It Does Not Take Much To Make The World A Better Place.

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

Many desert animals around the world are in danger of becoming extinct. In this enlightening, Spanish-translated nonfiction title, readers will learn a few of the causes of extinction in the desert and what problems extinction causes for animals, wildlife, and humans alike. Through vibrant photos of beautiful animals and stunning facts in conjunction with informational text and useful charts and diagrams, readers will learn and understand concepts such as habit loss and learn ways that animal activists help to protect animals and their environments, as well as helpful tips to get involved in...

Examines different kinds of relationships, discussing why they work and what to do when they do not work.

How are crayons made? Clear wax is melted in a factory. Once it's melted, color is added to it, it is poured into crayon-shaped molds, cooled, and wrapped in a paper label. Sorted into sets, the brightly colored crayons are boxed and sent in trucks to stores to be sold to you.

"Jeanette Walls narra en EL CASTILLO DE CRISTAL el gran secreto de su familia. Su infancia queda marcada por unos padres carismáticos pero sobrecargados de problemas: el padre es alcohólico y la madre es una pintora que aborrece la vida convencional y no asume la responsabilidad de criar a sus hijos. Los cuatro hermanos aprenden a cuidar de sí mismos, se protegen unos a otros, y finalmente consiguen salir del círculo infernal en que se convierte la familia para marcharse a Nueva York."--