CO2-Fußabdruck (Carbon Footprint)
Die Gesamtmenge der durch eine Aktivität verursachten Treibhausgase, gemessen in CO2-Äquivalenten (CO2e).
Um den Fußabdruck genau zu berechnen, nutzen Unternehmen Ökobilanzen (Life Cycle Assessments, LCA). In der Softwareentwicklung senkt die Optimierung von Code direkt die benötigten CPU-Zyklen und damit den Scope-2-Fußabdruck des Rechenzentrums.
graph LR
Center["CO2-Fußabdruck (Carbon Footprint)"]:::main
Rel_proof_of_work_pow["proof-of-work-pow"]:::related -.-> Center
click Rel_proof_of_work_pow "/terms/proof-of-work-pow"
Rel_renewable_energy["renewable-energy"]:::related -.-> Center
click Rel_renewable_energy "/terms/renewable-energy"
Rel_energy_efficiency["energy-efficiency"]:::related -.-> Center
click Rel_energy_efficiency "/terms/energy-efficiency"
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🧒 Erkläre es wie einem 5-Jährigen
Stell dir vor, jedes Mal, wenn du Auto fährst oder den Computer einschaltest, steigt eine unsichtbare Rauchwolke in den Himmel. Der CO2-Fußabdruck misst, wie groß diese Wolke in einem Jahr wird.
🤓 Expert Deep Dive
Das GHG Protocol unterteilt Emissionen in Scope 1 (direkt), Scope 2 (indirekt durch Strom) und Scope 3 (Lieferkette). Proof-of-Work (PoW) Netzwerke wie Bitcoin verursachen massive Scope 2-Emissionen. Ein Wechsel zu Proof-of-Stake (PoS) senkt den Energiebedarf um 99%. Oft ignoriert wird der Elektroschrott (Scope 3) durch kurzlebige Mining-Hardware.
❓ Häufig gestellte Fragen
Does a carbon footprint only measure carbon dioxide (CO2)?
No. It measures all greenhouse gases, including methane (CH4) and nitrous oxide (N2O). They are converted into a standard unit called 'CO2 equivalent' (CO2e) so they can be easily compared.
Why do blockchains like Bitcoin have such a large carbon footprint?
Bitcoin uses a system called 'Proof of Work' to secure its network. This requires specialized computers (miners) to run constantly, using massive amounts of electricity. If that electricity comes from fossil fuels, the carbon footprint is very high.
What is 'embodied carbon'?
Embodied carbon refers to the greenhouse gas emissions created when a product is manufactured and transported, before it is even turned on. For a laptop, a huge portion of its lifetime carbon footprint comes just from building the microchips.