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Toronto Hydro 2012 CR Report

INTRODUCTION OUR SERVICES OUR WORKFORCE OUR ENVIRONMENTal INITIATIVES OUR COMMUNITY OUTREACH OUR ECONOMIC PERFORMANCE OUR GOVERNANCE, COMPLIANCE AND BUSINESS CONDUCT Changes in Emission Levels In 2012, we generated 110,300 tonnes of carbon dioxide equivalent (tCO2e); year-over-year variances include: Flet — We saw a 5 per cent reduction in emissions over 2011, which can be explained by a reduction of capital work, fewer vehicles in our fleet, and increased use of biodiesel fuel. 5 Line Loss — We saw a 30 per cent increase in emissions over 2011 due to the higher provincial emission factor used to calculate GHG. Facilities — We saw a 22 per cent reduction in natural gas emissions and a 27 per cent increase in electricity emissions. This increase is attributed to the higher provincial emission factor. 30% 22 27% Why Toronto Hydro’s GHG Emissions are Calculated Using Federal and Provincial Emission Factors Toronto Hydro calculates our GHG emissions using the carbon dioxide intensity figure for the province of Ontario, as published in Environment Canada’s National Inventory Report 1990-2010: Greenhouse Gas Sources and Sinks in Canada. Emission intensity figures are based on the supply mix used to generate electricity for the Province of Ontario and measured in tonnes of carbon dioxide equivalent emissions per gigawatt-hour. Electricity generation methods include coal, refined petroleum products, natural gas, nuclear, hydro, biomass and renewables. The more energy efficient the method of generation is, the lower the emission intensity. The province of Ontario has replaced most of its coal-fired generation with wind, solar, natural gas and hydro-electric resources. However, from 2009 to 2010 there was an increase in the use of natural gas and coal generation in Ontario’s supply mix. As a result, there was an increase in Ontario’s electricity emission intensity from 1.0 in 2009 to 1.3 in 2010. To be consistent with our methodology of using the latest emission factors published by Environment Canada and for the purposes of this report, we have used the higher electricity emission intensity figure of 1.3 to calculate our GHG emissions. TORONTO HYDRO 2012 corporate respnosibility report 69


Toronto Hydro 2012 CR Report
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