Collating data into an easier to use format

We have to assume most of the people heading to this repo eventually will have little expertise in this space. To be a success I believe this project needs to parse the vast information in this space and decide on concrete simplified (yes probably opinionated) numbers.

@mrchrisadams we're starting to get some great detailed answers in this repo. The questions seem to be boiling down to just two forms:

- What's the kWh per X for something.
- What's the Carbon per X for something.

**Note:** Carbon per X is also another way of saying an "SCI Score"

Once an issue is closed I propose we add it to a DATA FAQ document in the repo, with a format something like:

Question: What's the "XXX per XXX"?
Summary Answer: The summary/averaged/good-enough-for-most-situations number.
Detailed Answer: Link to the issue where this is discussed with more info (this also gives people the opportunity to comment on the choice incase they disagree) OR link to an external source of this information if we are just pointing to someone else's data.

The first place people should go to is the FAQ, and the thing we should be sharing round is the FAQ. Raising an issue should have a checkbox asking people if they have read the FAQ, raising an issue should hopefully eventually be a rare occurrence as most of the information is in the FAQ.

What do you think?