1. How do the earth systems affect each other? Earth systems interact by filling each others' needs with solutions. For example, a lot of things in the biosphere need to drink water to survive. That's where the hydrosphere provides them with water. 2. How can an understanding of environmental science aid in handling natural disasters? An understanding of environmental science aids in handling natural disasters by giving us more background when dealing with climate issues that come upon us. 3. What efforts can we make to create a sustainable future? Some efforts we can make to create a sustainable future are educating ourselves on climate change, lowing our carbon output, and cleaning up after ourselves.