I do see differences throughout the countries. This is because different countries are more or less aware of their carbon footprint and how to care for it. It shows the awareness levels throughout the Earth.

Another factor would be that different countries have different average temperatures, so they need for electric heating/cooling would be different. For example, here in Maine most people heat their houses for more months than people do in California.

Charlotte, you have a really good point. We all have different temperatures and when we heat our houses. But this also goes along with the undeveloped countries. They don’t have enough resources to help lower their CO2 emissions.

An additional factor to differences in carbon footprint would be what the people of different countries have access to. In countries such as Chad or Rwanda, many people are facing extreme poverty and don't have access to cars, airplanes, fast fashion, etc. and other things that produce significant carbon emissions, so their footprint will obviously be lower. At the same time, industrialized countries such as the US or Canada use energy sources that are not clean, mainly coal and oil  which contribute to their citizen's carbon footprint. Moreover, food production facilities, particularly meat, release a significant amount of carbon emissions into the air, and over here in the US, we love a good hamburger or steak! Basically, your access to certain resources greatly factors into the differences in two people's carbon footprint.