Pegada de Carbono (Carbon Footprint)
Quantidade total de gases de efeito estufa gerada por uma atividade, medida em equivalente de CO2 (CO2e).
As empresas usam a Avaliação do Ciclo de Vida (ACV) para medir sua pegada de carbono. Na engenharia de software, escrever códigos eficientes reduz o processamento necessário (CPU) e, por consequência, as emissões de Escopo 2 dos servidores.
graph LR
Center["Pegada de Carbono (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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🧒 Explique como se eu tivesse 5 anos
Imagine que toda vez que você liga o computador ou anda de carro, uma pequena nuvem invisível de fumaça sobe ao céu. A pegada de carbono mede o tamanho exato dessa nuvem ao longo de um ano.
🤓 Expert Deep Dive
O GHG Protocol categoriza as emissões em Escopo 1 (diretas), Escopo 2 (eletricidade) e Escopo 3 (cadeia de valor). Redes Proof-of-Work (PoW) possuem alto Escopo 2 devido à mineração. A migração para Proof-of-Stake (PoS) reduz esse consumo em 99%. O lixo eletrônico (e-waste) dos equipamentos de mineração é um enorme problema de Escopo 3.
❓ Perguntas frequentes
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.