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# Long description

This figure shows the Summary screen of the OU carbon calculator after a student has answered the questions to calculate their existing personal carbon footprint. On the far left are the fourteen tabs that access the calculator’s screens. From top to bottom the tabs are Welcome; Your household: Room heating; Water heating; Appliances; Travel; Flying; Food; Income; Goods; Infrastructure; Summary; Target; Decarbonisation.

In the upper centre panel of the screen is a two-column table. The left hand column shows the student’s existing personal carbon footprint of 14.89 tonnes carbon dioxide equivalent emissions per year and its components, such as Home energy at 1.68 tonnes carbon dioxide equivalent emissions per year; Travel at 2.16 tonnes carbon dioxide equivalent emissions per year; Food at 0.91 tonnes carbon dioxide equivalent emissions per year, and so on. The right hand column shows the personal carbon footprint of an average inhabitant of the UK at 14.60 tonnes carbon dioxide equivalent emissions per year and its components broken down in the same categories as the student’s footprint.

Below the table are two boxes. The first enables a user to name and save a record of the current footprint when satisfied with their answers to the calculator’s questions; in this case the student’s existing personal footprint. The second box enables a user to open a previously saved footprint record via a drop-down menu or to delete an unwanted footprint record.

On the right of the screen are two stacked bar charts that repeat the information in the table in graphical form. The left hand stacked bar, labelled You, shows the student’s existing carbon footprint and its components the broken down into the same categories as in the table (Home energy, Travel, Flying, Food, etc.). The right hand stacked bar, labelled Average, shows the same information for an average UK inhabitant.