We've got big plans for Carbon.txt to improve the discoverability of sustainability data thanks to funding from NGI Search.
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Implementing carbon.txt

How you implement carbon.txt will depend on whether you are a provider of managed digital services, a self-hosted website operator, or an individual website owner.

[upstream]	
providers = [
	{ domain = "cloud.google.com", service = "shared-hosting" },
	{ domain = "aws.amazon.com", service = "cdn" }
]

[org]
credentials = [
	{ domain = "mycompany.com", doctype = "webpage", url = "https://mycompany.com/sustainability" },
	{ domain = "mycompany.com", doctype = "annual-report", url = "https://mycompany.com/carbon-emissions-2022.pdf" }
]