Gigantic drilling rigs

Modern society runs on fuel-and drilling rigs are needed to dig massive holes for fuels such as oil and natural gas. Some drilling rigs float on water. 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 will learn about the individual parts of a drilling rig and where waste from drilling goes. But, most importantly, they will learn one thing all drilling rigs have in common-they're all huge!.