Indicator: Carbon Footprint
Data and Data Discussion provided by
King County Benchmark Program
Sustainability Snapshot:
The more we drive, build, and consume, the more greenhouse gases we pump into the atmosphere and the larger our carbon footprint. Public transit and residential density play a role in the size of our footprint, as does the weather, electricity prices and the carbon intensity of electricity generation (here Northwest hydroelectric power is a big advantage). In a comparative study of 100 metropolitan areas, Seattle-Tacoma-Bellevue had the fifth smallest footprint. (1)
Sustainability Trend:
Since 2004, the state's and King County's emissions have been on the rise. In particular, transportation related GHG emissions and total energy use in King County continue to rise.
-
Percentage Share of Greenhouse Gas Emissions for All King County Businesses and Residents by End Use. The carbon footprint is a measure of the total amount of greenhouse gases produced for a region in terms of carbon dioxide equivalents.
-
Greenhouse gas (GHG) emissions such as carbon dioxide and methane are the primary cause of human induced climate change. The GHG emissions Atmosphere Indicator focuses on measuring progress towards reducing all types of GHG emissions from all activities within King County's geographic area. For detailed information about how King County Government is reducing emissions associated with government operations, see the KingStat Climate Protection Performance Measure.
Drivers: In King County, greenhouse gas (GHG) emissions are primarily caused by fossil fuel use (gasoline and diesel) for transportation and to a lesser but significant extent to heat our buildings (natural gas and heating oil). Combusting fossil fuel (e.g. coal) to produce electricity is also a source of GHG emissions, although in King County, because of the prevalence of hydropower, this is less of a source than in many other regions.
Status: As of 2002, the King County region (all residents and businesses) produced approximately 23 million metric tons of carbon dioxide (CO2) equivalents annually. This is about one quarter of Washington State's emissions and roughly 0.3% of the United States' emissions. GHG emissions in Washington State decreased slightly from 2000 to 2003. This trend also very likely occurred in King County, although to a lesser degree. Many analysts attributed this trend to significant energy price swings during this period. Since 2004, the state's emissions have been on the rise.
However, there are important reasons for optimism. For example, the City of Seattle (which is responsible for roughly 30% of King County's overall emissions) reported emissions in 2005 to be 8% below 1990 levels. They attribute this reduction to several factors, such as offsetting the emissions generated by Seattle City Light's electricity production through innovative emissions reduction projects. They also report that conservation efforts, in conjunction with many residential and commercial users switching from heating oil to lower carbon intensity natural gas, contributed to this progress.
Despite these successes, transportation related GHG emissions in King County continue to rise; this trend, evident in several reports, illustrates the significant challenge that King County is facing to reduce its emissions. Additionally, total energy usage in King County, as reported by Puget Sound Energy and Seattle City Light, has increased over the last several years.
-
Data comes from KingStat Environmental Indicators, King County Natural Resources and Parks.
- collapse all