updated B-1 decarbonization policy

[Ines Koch]

Changes that I incorporated based on input at the task force meeting 5/29

- added building baseline study in main section, analysis and reference

- deleted references to ZNE

- added references to Energy Efficiency Reco (BE-4)(was new that evening) and deleted the reference table to the GGPR as this became part of the BE-4 reco.

- reference to the advantage of having no gas grid

- made it clearer what the aim nearly zero carbon means

- substituted n.a. in the summary table with 0 (zero)

- added that outreach is needed via the Sustainability Office: advocacy, online tools, commercial

- doubled the cost

Thanks Amber for doing the editing work :)

Ines