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5C Page 13 Indicator Results City-wide Greenhouse Gas Emissions and Energy Use Table 1 shows the Redwood City Community Greenhouse inventory by sector. Highlights are as follows: . Transportation uses the most energy and emi.ts the most greenhouse gas emissions (51% of total greenhouse gas emissions) of any sector in the city~wide inventory. Residential, commercial and industrial buildings account for another 43% of greenhouse emissions, and waste accounts for 6% of emissions. . Redwood City's 6.71 tonnes2 of CO2 equivalent emitted per capita is similar to the 6.75 tonnes of C02 equivalent emitted per capita in the City of San Mateo. Total per capita emissions inventoried in other Bay Area cities vary widely (for instance, 5.23 tonnes of CO2 Equjvalent per capita in El Cerrito and 7.91 tonnes of CO2 Equivalent per capita in Hercules'! However, some differences between cities may have as much to do with unstand8~ iized inventory protocols (particularly around measuring transportation emissions. waste emissions, and uembodied" emissions) and regional forces like miles of through-Co ::xing regional highways as with extremely different consumption patterns. Table 1: Ci1:V-\iide ("Community") Greenhouse Gas Emissions and Ener~ y Use in 2005 -T-~02 Equivalent CO2 Equivalent CO2 Equivalent Total Energy {Total Tonnes) (Tonnes Per Capita) (%) Used (MMBtu3) Residential 98,802 1.26 18.9 1,738,288 Commercial 58,866 0.75 n.2 1,075,303 Industrial 67,865 0.87 13.0 1,264,244 Transportation 266,867 3.42 50.9 3,653.965 - Waste 31,646 0.41 6.0 N/A TOTAL 524,046 6.71 100.0 7,731,801 Source: Redwood City Inventory of 2005 Community Greenhouse Gas Emissions, 2008 Building Sector Greenhouse Gas Emissions by Selected City Comparisons to surrounding cities can give Redwood City a relative sense of its own greenhouse gas emissions perfoffilance. The cities listed in this indicator have calculated building greenhouse gas emissions using the ICLEl protocol, which is endorsed by CARB and used by cities across the country. In this protocol, building emissions figures are based on fairly standardized energy bill data and therefore provide a meaningful comparison, with a smaller margin of error, between cities. (Calculations of transportation or waste sector emissions, on the other hand, tend to use less standard data sources and therefore are less meaningful to compare from city to city.) Emissions inventories across all sectors are likely to be more comparable in the future as they are standardized by the state. Highlights of selected cities' buildings emissions are as follows: 2 "T annes" are a metric unit of measurement, equal to 1,000 kilograms, or about 2,200 pounds. T annes is the standard unit of measurement for emissions of CO2 equivalent. 3 "MMBtu" is one million British Thermal Units. Redwood City Page 13 Sustainability Indicator Analysis