Respiration is more than an individual act of breathing. At the cellular level, it describes a process akin to slow combustion—oxygen reacting with organic matter to release energy. Scaled outward, respiration encompasses the planetary exchange of gases through photosynthesis and decomposition that cycles carbon, oxygen, and life itself through atmosphere, ocean, and soil: the metabolic feedback loops that sustain entire ecologies. This chapter takes the entanglement of these scales as its central thread. Drawing on three art projects—Cloud Tasting, Thinking Like a Cloud, and Whale Falls, Carbon Sinks—the author explores aerosols as matter that makes these cross-scale respiratory relations sensed and tangible. Through aesthetic and embodied encounters with clouds, bioaerosols, and chemistry of whale ecology, the projects propose alternative modes of knowing the atmosphere: not as a domain to be optimized or governed, but as a shared respiratory commons inhabited from within.