In the video We Exhale, Engelberts followed the river from the Mediterranean to its source in Switzerland, charting its transformations, its journey, and its many voices. Organic materials which fill the water are slowly broken down through chemical processes, creating carbon dioxide (CO2). What sound does a river make when exhaling? Does this sound change as the river is poisoned, distorting and fading from its natural state? Engelberts collaborated with sound artist Liz Harris to form sensitive soundscapes from ambient noise combined with field recordings. Together, they created a poetic means to reflect on how a poisoned river might possibly exhale.