You are downloading the Clean Air AppX file v220.127.116.11 for Windows Phone. Clean Air is a free and useful News & Weather app: Clean Air is an application that allows users to see the current and forecasted air quality index (AQI) for the United States of America. This ... You can now download the offline AppX file to install & try it.
Download Locations for Clean Air 18.104.22.168 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Clean Air AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.