:Are holes hurting our planet? The best diggers out there lead an excavation exploration to find out! Like busy moles, we humans dig lots of holes to get things done: in the ground, in our oceans, even in our bathrooms! Unfortunately, many of these holes rip apart the ground, spill dangerous chemicals, and permanently damage the earth. But used correctly, our shovels and machines might be able to help our planet instead of destroy it." inside flap of front cover.
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