32 pages : color illustrations ; 23 cm.
Edge books. Sanitation investigation
Includes bibliographical references (page 31) and index.
Watery goodness -- Thirsty people in history -- Dirty way to get clean -- Where does that water come from?
Even if it looks clean, untreated water can have deadly bacteria in it. Discover the nasty effects of unclean water, and learn about the process by which clean, clear water gets to your tap.
Accelerated Reader AR MG 4.3 0.5 122735.