Geoffrey M. Horn – författare

How can we keep our drinking water pure? What’s the best way to dispose of our waste? How can we limit pollution? Answering these questions is the job of environmental engineers. Using the latest technology and research, environmental engineers are changing our world. Learn about the many different jobs that make up this cutting-edge career.

This high-interest/ low reading level series gives readers an exciting, close-up look at some of today''s hottest sports stars. Each book takes readers behind the headlines to reveal not only the early lives and inspirations, but the hard work and determination that got these young stars where they are today.

Being a pit crew worker is truly one of the dirtiest, most dangerous jobs there is. Learn who tackles these jobs, why they do them, and how they stay safe doing them.

An exploration of the job of a sewer inspector that describes what they do and discusses challenges they face, tools they use, and other related topics.

This book explores the geography, history, people, government, and economy of the Sooner State. Lists of key people, places, celebrations, plants and animals, cities, and political figures, plus recipes and craft projects, add to the understanding of a state that is renowned for its Native American culture as well as its wealth of natural resources.

Help readers explore the geography, climate, history, people, government, and economy of South Dakota. The third edition of this popular series provides lists of key people, sites, cities, plants and animals, political figures, industries, and events in the Mount Rushmore State.