This is the eBook version of the printed book. This Element is an excerpt from Out of Water: From Abundance to Scarcity and How to Solve the World's Water Problems (9780131367265) by Colin Chartres and Samyuktha Varma. Available in print and digital formats. Understanding, preparing for, and mitigating the most probable impacts of climate change on water resources and food production. Fifteen years of bickering over whether or not climate change is caused by humankind has meant much time and effort that could have been devoted to mitigation and adaptation has been lost. In terms of agriculture and water resources, the cause is relatively unimportant compared to deciding how we can deal with the impact.