Human Environment Interaction is the relationship between the natural environment and human beings. We affect their environment and our environment affects us. Landforms, bodies of water, plant and animal life, climate and evlevation area parts of the natural environment that can both help and challenge us. Living near a river for example can make it easy for people to irrigate (water) their crops. During heavy rain however, that same river might rise higher than its banks. The flooding could destroy crops and farmland. Humans might affect the river through their own activities, too. Building dams, canals, and reservoirs, fishing, and polluting would all have an effect on the river and its ecosystem. Building a dam is one way that