The carbon footprint, also known as the greenhouse gas footprint, is a measurement of the total amount of greenhouse gases released by a particular activity, good, entity, or nation. Carbon footprints are typically expressed in tons of emissions (CO2-equivalent) per comparative unit, such as per person, year, protein kilogram, or kilometer traveled.

1. About to know carbon footprint
The carbon footprint, also known as the greenhouse gas footprint, is a measurement of the total
amount of greenhouse gases released by a particular activity, good, entity, or nation. Carbon
footprints are typically expressed in tons of emissions (CO2-equivalent) per comparative unit, such
as per person, year, protein kilogram, or kilometer traveled.
The emissions for a product's complete life cycle, from production through the supply chain to final
consumption, are included in the product's carbon footprint. Similar to an individual, an
organization's carbon footprint comprises both direct and indirect emissions that the organization is
responsible for (referred to as Scope 1, 2, and 3 in the Greenhouse Gas Protocol, which is used for
the carbon accounting of companies).
Depending on whether the focus is on a nation, company, product, or person, there are several
approaches and online tools available to assess the carbon footprint. Customers may choose a
product based on its carbon footprint, for instance, if they want to be environmentally conscious. The
carbon footprint can be used to distinguish between economic activities with high and low carbon
footprints in the context of reducing climate change. In other words, the idea of a carbon footprint
enables everyone to compare the effects that different people, things, businesses, and nations have
on the climate. Creating goals and plans for minimizing the carbon footprint is aided by this.
The carbon dioxide equivalent (CO2eq) per unit of comparison is a standard way to express the
carbon footprint. It totals all greenhouse gas emissions—not just carbon dioxide—that are produced
by various organizations, events, businesses, and other activities. Other definitions simply consider
carbon dioxide emissions, leaving out emissions of other greenhouse gases such as nitrous oxide
and methane.

2. One advantage of complete carbon footprint reporting (including emissions under Scope 3) is that it
closes gaps in existing frameworks: Currently, international transportation is not counted in a
country's GHG inventory for the UNFCCC. Instead of accounting for the production of goods and
services (which may be imported) on behalf of residents, which is known as consumption-based
accounting, GHG emissions in such inventories are from domestic activities (also known as
territorial-based accounting or production-based accounting). This type of complete carbon footprint
reporting, also known as consumption-based carbon accounting, places the onus of responsibility for
emissions on final demand, or on those who use the goods and services.