The essential question of this class is How do the earth systems affect each other? In my opinion the earth’s systems affect each other in a cause and effect way. The flow of the systems could get messed up if something happens to the previous system. For example in the Geosphere an earthquake could cause two tectonic plates collide with each other causing the land to shake. The second question is How can understanding of environmental science aid in handling natural disasters? If you understand environmental science aid your able to prepare for unpredictable situations. The final question is What efforts can we make to create a sustainable future? I would suggest keeping yourself informed. Another suggestion is recycle to keep earth healthy and clean.