Carbon Footprint

What is a carbon footprint?
The carbon footprint is the measure of the damage caused by human activities to the environment in terms of the amount of greenhouse gases produced, measured in units of carbon dioxide, and consists of two main parts: a direct (primary) footprint and an indirect (secondary) footprint.
The primary footprint is a measure of direct CO2 emissions from the combustion of fossil fuels, including domestic energy consumption and transportation (for example, cars and airplanes), while the secondary footprint is a measure of indirect CO2 emissions from the entire life cycle of the products we use, related to their manufacture and eventual degradation.