Open data - what kind of and where to find it

[User-314]

To evaluate how "green" your software (or more generally your computing) is, quite a lot of aspects are relevant. And for every aspect data is needed to evaluate this single "point of view".
I'd like to gather ideas on which data is relevant (or seems to be but is not relevant) and where this data can be found.
Some starting points:

1. The datacenter my software is running: Environmental debts since construction, actual environmental impact overall and/or related to my software
2. The servers my software is running on: Environmental impact of production, energy efficiency
3. The network my data is transported over: Environmental impact of operation and maintenance
4. The electric power all these components use: How and where is it produced
5. ... any other ideas