CK-12 Foundation
Ck 12: Life Science: 3.21 Agriculture
Learn how biotechnology can alter crops to change many different phenotypes of plants.
Geography 4 kids
Geography4 kids.com: Using Groundwater
Of course humans rely on freshwater for drinking and washing, but we also need it in great quantities to water crops and livestock for the food we consume. Understand the systems in place to purify and store groundwater to do this.