Speck: Crowdsourcing air quality with home based continuous monitoring devices Posted on August 26, 2016 by timbatchelder What one family learned from using a $200 air-quality sensor for a month. Source: How Dirty Is Your Air? Share this:TwitterFacebookTumblrPinterestRedditWhatsAppEmailLinkedInPocketPrintLike this:Like Loading... Related Published by timbatchelder View all posts by timbatchelder