Washington State 1990 Greenhouse Gas Emissions Inventory

Washington State 1990 Greenhouse Gas Emissions Inventory

Washington State

1990 Greenhouse Gas Emissions Inventory

December 2007

Publication 07-02-021

Washington State 1990 Greenhouse Gas Emissions Inventory

i

Washington State 1990 Greenhouse Gas Emissions Inventory

Table of Contents

Table of Contents............................................................................................................................1 Acronyms and Key Terms..............................................................................................................2 1.0 Introduction------------------------------------------------------------------------------------------------3

2.0 Washington State GHG Emissions---------------------------------------------------------------------4

3.0 Description of GHG by Sector--------------------------------------------------------------------------6

If you need this publication in another format, please call the Department of Ecology at (360) 407-6821.

Washington State 1990 Greenhouse Gas Emissions Inventory

Acronyms and Key Terms

C – Carbon

CFCs – Chlorofluorocarbons CH4 – Methane CO2 – Carbon Dioxide

CO2e – Carbon Dioxide Equivalent EIA – U.S. DOE Energy Information Administration

EIIP – Emissions Inventory Improvement Project (US EPA) GHG – Greenhouse Gases GWP - Global Warming Potential HFCs – Hydrofluorocarbons

IPCC – Intergovernmental Panel on Climate Change

LMOP – Landfill Methane Outreach Program LNG – Liquefied Natural Gas LPG – Liquefied Petroleum Gas

Mt - Metric Ton (equivalent to 1.102 short tons) MMt – Million Metric Tons MSW – Municipal Solid Waste MW – Megawatt N – Nitrogen N2O – Nitrous Oxide NO2 – Nitrogen Dioxide

NASS – National Agricultural Statistics Service NOx – Nitrogen Oxides

ODS – Ozone-Depleting Substances ODS – Ozone-Depleting Substances PFCs – Perfluorocarbons

RCI – Residential, Commercial, and Industrial SED – State Energy Data

SF6 – Sulfur Hexafluoride

SGIT – State Greenhouse Gas Inventory Tool Sinks – Removals of carbon from the atmosphere, with the carbon stored in forests, soils, landfills, wood structures, or other biomass-related products. T&D – Transmission and Distribution UNFCCC – United Nations Framework Convention on Climate Change U.S. EPA – United States Environmental Protection Agency

U.S. DOE – United States Department of Energy

USDA – United States Department of Agriculture

USGS – United States Geological Survey

Washington State 1990 Greenhouse Gas Emissions Inventory

1.0 Introduction

In 2007, the Washington State Legislature directed the Departments of Ecology

(Ecology) and Community, Trade, and Economic Development (CTED) to estimate the amount of greenhouse gas (GHG) emissions from Washington in 1990 and report the findings by December 31, 2007.

RCW 80.80.020 (2)(a) By December 31, 2007, the departments of ecology and community, trade, and economic development shall report to the appropriate committees of the senate and house of representatives the total greenhouse gases emissions for 1990 and the totals in each major sector for 1990.

This report fulfills that request and describes the 1990 GHG emissions for each of the seven major sectors that contribute to greenhouse gases in Washington:

Electricity use and supply

Residential, commercial and industrial fossil fuel combustion Transportation Industrial processes

Fossil fuel industry (fugitive emissions – greenhouse gas released from leakage) Waste management Agriculture

Estimates of Washington’s 1990 greenhouse gas (GHG) emissions were developed with the same approach to emissions accounting used by the U.S. EPA in its national GHG emissions inventory and its guidelines for States. These inventory guidelines are

consistent with the Intergovernmental Panel on Climate Change (IPCC) Good Practice Guidance document.1The IPCC is the international organization responsible for developing coordinated methods for national inventories.

This report covers the six types of greenhouse gases: 1. Carbon dioxide (CO2) 2. Methane (CH4)

3. Nitrous oxide (N2O)

4. Hydrofluorocarbons (HFCs) 5. Perfluorocarbons (PFCs) 6. Sulfur hexafluoride (SF6)

A common metric called CO2 equivalence is used to present the GHG emissions data in this report. This metric incorporates the Global Warming Potential (GWP) of each gas so that the impacts of emissions from different gases can be compared. The Center for

Climate Strategies (CCS), Ecology, and CTED managed a larger study on Washington’s Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories, Intergovernmental Panel on Climate Change, May 2000

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Washington State 1990 Greenhouse Gas Emissions Inventory

GHG emissions, from 1990 through 2005 with projections to 2020.2 Please refer to this study for further details about assumptions and methods used to calculate the 1990 GHG emissions.

2.0 Washington State GHG Emissions

In 1990, Washington emitted about 88.4 million metric tons (MMt) of total carbon dioxide equivalent (CO2e).This amount is the second highest in the western states, with California being the highest and is approximately equivalent to eliminating 57 million vehicles from the roadway. Table 1 below shows the top three sources of Washington’s GHG emissions and the percent each source contributed to the state’s total emissions in 1990.

Table 1: GHG Emission Sources – 1990

GHG Emission Sources for 1990 Percentage of Contribution

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