Carbon footprint just means how much CO/CO2 something generates.
If you want to know the carbon footprint of your car, put a balloon on your tailpipe, drive around a bit. Stop, take the balloon and count how much CO2 is in there. That is the carbon footprint in laymans terms.
Its not completely fair though, because you want to calculate some other things in the footprint as well.
The reason we want to know carbon footprint is because we have too much of it in the atmosphere and are actively trying to reduce it. For that to work, you have to do some bookkeeping of the CO2 that we put in the atmosphere and that we take out. To simplify that bookkeeping, we’ve created the carbon footprint concept.
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