In her later documentaries such as "Last Call at The Oasis (2011)" and "Misconception (2014)" "," Yu focused on capturing the big picture and understanding how these issues intertwined with other aspects of life such as climate, population, and the environment. "Last Call at The Oasis" addresses the water crisis in the United States, and working on the film made her consider the impact of the crisis on her children and their children. This project became more personal to Yu and compelled her to complete it. It took six months of research prior to filming, as Yu wanted to create the big picture of the facts and threats of the water crisis in the domestic United States.