Assessing Data for Precursors of Co2 and Methane in King County,Washington,1990

Abstract

Evaluation of policies designed to reduce emissions of global warming gases will require valid data about in-use quantities of these gases'precursors. This article assesses the quality of avail able data for many significant precursors of CO ₂ and methane in King County, Washington, which is an area with minimal variations in climate as well as rapid population growth and de velopment. Available data support an estimate of 21,000,000 metric tons of CO ₂-equivalent gases emitted in 1990 from selected precursors. There is also evidence that electricity conserva tion programs and recycling both reduce CO ₂ emissions. Requirements for adequate baseline data include constant and valid data definitions as well as monthly time series. To evaluate poli cies over periods of years, databases must be designed to withstand frequent and rapid changes in national economies; they must also permit analysis of consumer choices affecting fossil fuels and other precursors of warming gases. In almost every case, current data do not satisfy these requirements.

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