Clearly , electricity usage dominates our emissions profile . To provide more visibility into the breakdown of non-electric emissions , Figure 11 has been provided to show Scope 1 emissions only ( by source activity ). This category is dominated by space and water heating , followed by buses and PTVs .
Figure 11 : Authority-controlled Scope 1 Emissions by activity
The Sustainability Plan that we have developed is focused on all these areas , so as we make progress in using less energy and water and increasing our use of electric vehicles and equipment , we are also reducing our GHG emissions .
Scope 2 Purchased Electricity
For purposes of calculating emissions from purchased electricity for the GHG inventory , our analysis used the Location Based Accounting Method with regional emissions data from the EPA . 51 This method takes average emission profiles from the regional electrical grids from which we draw power , rather than just the emissions profile of Dominion Energy , as their portfolio of electric generation assets covers a larger footprint
Subregional Fuel Mix than the Washington , DC , region . They may also purchase some electricity from third parties in the open market that they then sell
8 % to us . The composition of this regional emissions profile is shown
19 % 38 % in Figure 12 with approximately 46 % of the regional electricity mix
Coal generated by nuclear and renewable energy sources , which have
34 % minimal GHG emissions per se .
Nuclear Natural Gas
Renewables Others
In addition , Dominion Energy , recently announced a Net Zero Emissions by 2050 target 52 and the state of Virginia passed 100 % renewable energy by 2045 legislation 53 in March 2020 . These actions and others like it are highly encouraging as it allows the
Figure 12 : EPA Subregion Generation Mix
51 US Environmental Protection Agency , “ Emissions & Generation Resource Integrated Database ( eGRID ) 2018 ”
55