[x] Index Page: Replace "The book has been designed to be a living document that will be updated as more data becomes available." with "This web book is designed as 'best available' document for the 2011-2021 energy trends data and reports. This website will be updated when updates to the underlying 2011-2021 data or fixes become available. Future year trends reports will be tackled in a different context and reporting structure."
[x] Update figure 2.1 with a HiDPI image
Consider taking the bullet points from the key takeaways and add them as bullet points under paragraphs you have in each appropriate section in conclusions.
Comments from @dayne
Consider taking the bullet points from the key takeaways and add them as bullet points under paragraphs you have in each appropriate section in conclusions.