To better understand climate change and sustainability, it is crucial to know 10 basic carbon terms. Carbon emissions indicate the release of greenhouse gases into the atmosphere. To unify them into a single value, a metric is used CO2 equivalent (CO2e) a their exact quantity quantifies carbon accounting. Governments can introduce anti-pollution measures carbon tax.

To offset these impacts, they serve carbon offsets and tradable carbon credits. They buy and sell on carbon market, while these reduction projects are verified by a certified carbon register. Removes excess emissions from the atmosphere  carbon capturer, such as forests. The ultimate goal is to reach a state where emissions are released and removed in complete balance, which is called carbon neutrality.

1. Carbon Credits

These are tradable certificates that represent a permit or offset for 1 tonne of CO2 (or its CO2e equivalent) from the atmosphere. In practice, they act as a „pass“ that allows a company to produce a certain amount of emissions. These credits are usually issued by government or international bodies under „cap-and-trade“ regulatory systems, where companies are allocated a limited number of credits to meet emission limits.

2. Carbon Emissions

This term refers to the release of carbon dioxide into the atmosphere, but also serves as a general term for other greenhouse gas (GHG) emissions when quantified and converted into CO2 equivalent (CO2e). The main greenhouse gases regulated by the United Nations Framework Convention on Climate Change (UNFCCC) include, in addition to CO2, methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3).

3. Carbon Offset

It is a project or activity that reduces or removes carbon emissions from the atmosphere in order to compensate for the unavoidable emissions produced by others. While credits represent a permit to pollute within a regulated market, offsets operate voluntarily and can include initiatives such as renewable energy projects, reforestation, or methane capture. Companies purchase them primarily to voluntarily reduce their overall carbon footprint.

4. Carbon Tax

It is a government-regulated environmental tax or penalty that organizations must pay for their excess production of carbon dioxide and other greenhouse gases. This mechanism sets a fixed price per ton of CO2 emitted, providing a stable and predictable price signal to companies and investors, but unlike emissions trading systems, it does not guarantee a fixed limit on the total amount of emissions released.

5. Carbon Sink

It is a natural or man-made (technological) resource that has the capacity to store and remove carbon dioxide from the atmosphere. Trees are a key natural sink, as they absorb CO2 through photosynthesis and store it in their trunks, leaves and roots. Other particularly important sinks are the world's topsoil, which is estimated to store approximately 2,822 gigatonnes of carbon, or "blue carbon" ecosystems (such as mangrove forests), which can store up to four times more carbon than conventional terrestrial forests.

6. Carbon neutrality (Carbon Neutral)

This state occurs when anthropogenic carbon dioxide emissions released into the atmosphere are in balance with carbon offsets from projects to reduce and remove them. Carbon neutrality is typically achieved when an organization or country compensates for its own emissions by purchasing carbon credits/offsets. However, it is a different and looser concept than „net-zero,“ which requires actual primary emission reductions across the entire supply chain, rather than relying solely on offsets.

7. Carbon dioxide equivalent (CO2e)

It is a metric used to calculate and standardize all greenhouse gas emissions into a single value. It does this by comparing their global warming potential (GWP) to that of CO2. The GWP value determines how much of an impact (radiative forcing) one unit of a particular gas (e.g. methane) has compared to one unit of CO2 over a specified period of time, usually 100 years.

8. Carbon Market

There are two main types of markets in which carbon certificates are traded: the compliance market and the voluntary market.

• Mandatory (regulatory) market: It is required by law and operates under cap-and-trade schemes, such as the EU Emissions Trading System (EU ETS). The market is estimated to be worth around $1.5 trillion by 2024.
• Voluntary market: It is intended for entities that are not legally required to reduce emissions, but do so as part of their corporate social responsibility (CSR).

9. Carbon Registry

This is an organization that verifies and certifies the reduction, protection or removal of carbon emissions and issues carbon credit certificates based on its own rigorous methodologies. These independent bodies oversee audits and validation, ensuring that offsets actually help the environment. Recognised verification bodies and standards include Verra, Gold Standard and the Science Based Targets Initiative (SBTi).

10. Carbon Accounting

This process involves the actual quantification of carbon emissions and their reductions and is complementary to broader greenhouse gas accounting. Many organizations now also use systems called internal carbon pricing (ICP), a model through which a company itself assigns a monetary value to its emissions in order to manage risks and better navigate net-zero strategies. This process of measuring and analyzing emissions covers activities from direct consumption (Scope 1 and 2) to the wider supply chain (Scope 3). JRi&CO2AI