Basically, your carbon footprint is a measure of all the carbon dioxide (CO2) and other greenhouse gas emissions caused by your activities across the year. Yes, it's the emissions from all the trips you took and all the electricity you used. But it's also the emissions that went into making all the products you consumed and all the services you bought.
It works at the level of our products too. The life cycle of a TENA product starts with extracting natural resources and making raw materials. Next, we assemble all the materials in the manufacturing stage. Then the product is transported to the user, and finally, the user discards it after it has served its purpose. Each stage involves energy use, transportation and waste management. So, to get the true carbon footprint of our products, we need to consider all these stages.