King County's greenhouse gas reduction goals were established in 2007, and call for it to reduce emissions by 25% by 2020, 50% by 2030, and 80% by 2050, against a baseline of 2007.
King County releases periodic reports on greenhouse gas emissions, the latest one was released in 2019 and covers emissions from 2017. It shows that contrary to the goal of reduction of almost 25%, emissions stayed mostly flat between 2007 and 2017, although per capita emissions have been reduced.
The chart to the right shows emissions in the county, which include consumption emissions. It is understating the impact of air travel, which was estimated at 10% of the total jet fuel.
The chart shows the geographic-plus emissions. One thing you will notice is that electricity has emissions; the state already has a law in place for eliminating these emissions by 2045, the Clean Energy Transformation Act.
Transportation is dominated by passenger vehicles, although as noted before the air travel is under-reported here because it includes only take-off and landing (10%). In a more accurate representation air travel would be substantially larger.
Industrial emissions is declining, 8% since 2008. One interesting thing shown here is that almost a third is fugitive emissions, which includes hydrofluorocarbons and refridgerants. Fugitive emissions have increased 15% since 2008.
The chart below shows how the county plans to meet its greenhouse gas reduction goals: