<img width="640" height="439" src="https://www.cooperhewitt.org/wp-content/uploads/2018/12/131154_d455781b5d916884_b-700x480.jpg" class="attachment-large size-large wp-post-image" alt="Image features design for rectilinear air purifier in metal and wood laminate with hand-holds and modern glass vases displayed on top. Please scroll down to read the blog post about this object." style="display: block; margin-bottom: 5px; clear:both;max-width: 100%;" srcset="https://uh8yh30l48rpize52xh0q1o6i-wpengine.netdna-ssl.com/wp-content/uploads/2018/12/131154_d455781b5d916884_b-700x480.jpg 700w, https://uh8yh30l48rpize52xh0q1o6i-wpengine.netdna-ssl.com/wp-content/uploads/2018/12/131154_d455781b5d916884_b-300x206.jpg 300w, https://uh8yh30l48rpize52xh0q1o6i-wpengine.netdna-ssl.com/wp-content/uploads/2018/12/131154_d455781b5d916884_b-170x117.jpg 170w, https://uh8yh30l48rpize52xh0q1o6i-wpengine.netdna-ssl.com/wp-content/uploads/2018/12/131154_d455781b5d916884_b.jpg 1024w" sizes="(max-width: 640px) 100vw, 640px" data-attachment-id="32301" data-permalink="https://www.cooperhewitt.org/2018/12/13/lets-clear-the-air-the-rise-of-the-domestic-air-purifier/131154_d455781b5d916884_b/" data-orig-file="https://www.cooperhewitt.org/wp-content/uploads/2018/12/131154_d455781b5d916884_b.jpg" data-orig-size="1024,702" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="Drawing, Design for Air Purifier, 1960–1965" data-image-description="" data-medium-file="https://www.cooperhewitt.org/wp-content/uploads/2018/12/131154_d455781b5d916884_b-300x206.jpg" data-large-file="https://www.cooperhewitt.org/wp-content/uploads/2018/12/131154_d455781b5d916884_b-700x480.jpg" />In ancient Greece, air (along with earth, water, fire, and aether) was one of the five elements thought to comprise all substances. Questions of air quality began to arise in the Middle Ages, even before the composition of the atmosphere was discovered.[1] In the eighteenth and nineteenth centuries, as coal became deeply entrenched in both...