Will Arbery's Evanston "Salt Costs Climbing" (set in the city in which the author received his Master of Fine Arts Degree in 2015) is a perplexing experience as it shifts from realism to absurdism to surrealism. Its worthy topics of ecology and climate change notwithstanding, the play's repetitiousness and unprepared-for events are frustrating as well as the missing backstories. While it begins interestingly enough ,…