Our great sponsors
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**Tools and Data Sources** The calculator estimates flight emissions based on the [myclimate carbon footprint calculator.](https://www.myclimate.org/fileadmin/user\_upload/myclimate\_-\_home/01\_Information/01\_About\_myclimate/09\_Calculation\_principles/Documents/myclimate-flight-calculator-documentation\_EN.pdf) Data for CO2 emissions by country (2017) was downloaded from the [European Commissionsโs Emissions Database for Global Atmospheric Research](https://edgar.jrc.ec.europa.eu/overview.php?v=booklet2018&dst=CO2pc&sort=asc9). The map was built using the [leaflet open-source mapping library](https://leafletjs.com/) in javascript.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.