With a rental car and hundreds of pounds of blue chalk, Eve S. Mosher is making her mark on the Brooklyn landscape. The artist has been laying down a four-inch-wide stripe throughout the New York borough in an effort to bring attention to global warming. Drawing from recent NASA and Columbia University research, Mosher’s new work delineates an area ten feet above sea level — a spot that could be submerged in the aftermath of a major storm. Her discontinuous line will eventually encompass lower Manhattan, beginning at East 14th Street, before looping back into Brooklyn.