Modern society runs on fuel. Drilling rigs are needed to dig massive holes for fuels such as oil and natural gas. Some drilling rigs float on water and others are fixed in place. Some can even drill from a boat. Through informative text and full-color photographs, readers will learn the ins and outs of what makes a drilling rig work. They'll learn about the individual parts of a drilling rig and where waste from drilling goes. Vibrant photographs show these colossal diggers at work.