Soil We walk on it, play in it, build with it, grow our food in it, and get antibiotics from it. But what exactly is soil? What makes it so important? Can we survive without it? In Explore Soil With 25 Great Projects, young readers learn how vital soil is to our lives. It filters the water we drink and the air we breathe, and most of the food we eat either grows in soil or subsists on plants that grow there. Soil is a very important part...