Carbon footprint is the cumulative carbon dioxide emitted from humans, this includes driving, the amount of electricity you use, and even how long you have the ac on for. But keep in mind Carbon footprint isn't a bad or a good thing, it allows us to keep track of how much we use resources, but it also shows us how much gas we release into the air. To decrease our carbon emissions we must differentiate what's a need and what's a want. First off our needs, this includes cars, electricity, and foods and wants are products that we can live without. If we are able to reduce our wants we can help the carbon emissions lower and save our atmosphere.