“Breathing is the process of moving air into and from the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.” Human and non-human beings need to breathe. Nature breathes, and every factory and home also breathes as part of the urban metabolism. And you think for a second how long it’s been since you’ve breathed last? We may wonder why we ought to let our cities and rivers, mountains and seas, breathe... You may think it is to save the planet, but what is the planet other than ourselves?