my new findings on what a 'carbon footprint' is

My first interpretation was inaccurate. The carbon footprint is not represented by the littering of the can. This can would be an example of 1 0f many products that we use that contributes to our secondary footprint. Our secondary footprint is a measure of the indirect CO2 emissions from the whole lifecycle of products we use. It is a measure of the CO2 emissions caused in their manufacture and eventual breakdown i.e a car getting crushed uses a high power crusher which consumes a huge amount of energy. This process involves high CO2 emissions on our behalf. The factory that produces the can creates high CO2 emissions, another example of a secondary carbon footprint

Our primary carbon footprint is a measure of directly controlled uses of products and services that cause CO2 emissions. An example of a use of a service that causes CO2 emissions is home electricity. an example of product use that causes CO2 emmisions is the car or private transport.

The carbon footprint is a measurement of all greenhouse gases we individually produce and has units of tonnes (or kg) of carbon dioxide equivalent.