Carbon Footprint – A measure of all the greenhouse gases we individually produce, through burning fossil fuels and refrigerant gases expressed as tonnes. A single carbon footprint is one tonne of CO2 per year
On a car bonnet, a huge foot left a print (carbon footprint). They weighed the foot afterwards, it was one tonne. Making the foot green reminds you too that it is all about greenhouse gases.
A SINGLE CARBON FOOTPRINT = 1 tonne of CO2 per year.
A bit of research shows that "a single carbon footprint" (in the sense of one person's carbon footprint) is most unlikely to be one tonne. Individual carbon footprints vary enormously - many tonnes in the US and generally very small in undeveloped countries. Bear in mind the term "carbon footprint" includes other gases such as methane, so, not just CO2.
United Kingdom = 5.6 Tonnes of CO2 per person per year
United States = 15 tonnes of CO2 per person per year
- A carbon footprint includes all the different greenhouse gases that contribute to global warming, CO2, methane, nitrous oxide and refrigerant gases.
- Carbon dioxide is produced when we burn fossil fuels for electricity and transport.
- In 2016, the world average was 4 tonnes of CO2 per person per year released into the atmosphere.
- In 2019, 15 countries were responsible for almost three-quarters of the worlds carbon emissions.
- In 2017, China was responsible for 27.2% of all the world's carbon emissions.
The Greenhouse Effect
Solar radiation heats up the earth's surface and is emitted back into the atmosphere as infrared radiation. Carbon dioxide is transparent to solar radiation and yet absorbs solar radiation, thus, the presence of carbon dioxide in our atmosphere allows sunshine to penetrate to the surface but inhibits the emission of infrared radiation to space. This warms up the atmosphere and is known as the greenhouse effect.
CO2 and other greenhouse gases trap heat in the Earth's atmosphere.