CO2
das CO2
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carbon dioxide
The chemical formula and abbreviation for carbon dioxide, a colorless, odorless gas made up of carbon and oxygen. It is produced, among other things, through respiration and the combustion of carbon-containing substances, and contributes to global warming as a greenhouse gas.
Bei der Verbrennung von Kohle entsteht CO2.
Burning coal produces CO2.
| gender | neuter das |
|---|---|
| genitive | des CO2 |
| singular | plural | |
|---|---|---|
| nominative | das CO2 | – |
| accusative | das CO2 | – |
| dative | dem CO2 | – |
| genitive | des CO2 des CO2s | – |
The article changes with the case; it is shown in colour.
The 2 in “CO2” shows that a molecule contains two oxygen atoms; “C” stands for one carbon atom. In running text, the formula is often also written as “CO₂” with a subscript number.
Im Labor wurde die Menge an CO2 genau gemessen.
The amount of CO2 was measured precisely in the laboratory.
Common compounds with “CO2” include “CO2-Ausstoß” (CO2 emissions), “CO2-Emissionen” (CO2 emissions), “CO2-Konzentration” (CO2 concentration), and “CO2-Fußabdruck” (carbon footprint). Verbs such as “CO2 ausstoßen” (to emit CO2), “CO2 einsparen” (to save CO2), and “CO2 reduzieren” (to reduce CO2) are also frequently used.
Das Unternehmen will seinen CO2-Ausstoß bis 2030 deutlich senken.
The company wants to significantly reduce its CO2 emissions by 2030.
“CO2” is particularly common in texts about climate protection, energy, transportation, and industry. In these contexts, the focus is often on quantities, emissions, savings, or a reduction in concentration.
Durch den Ausbau erneuerbarer Energien soll weniger CO2 ausgestoßen werden.
The expansion of renewable energy is intended to reduce CO2 emissions.
