Dams

Viac o knihe

"Did you know that dams are made with millions of tons of concrete? Or that building dams often involves changing the course of large rivers? Dams are built to hold back massive amounts of water - but did you know they can also have tunnels, bridges, and more? These huge engineering projects are not easy! They take many years of planning and construction. Discover extreme facts about dams in this fun and kooky book"--