1 Source: International Energy Outlook 2008.

2 Source: Compiled by Earth Policy Institute from Worldwatch Institute, Vital Signs 2005 (Washington, DC: 2005); Worldwatch Institute, Vital Signs 2007–2008 (Washington, DC: 2008); Prometheus Institute, “23rd Annual Data Collection – Final,” PVNews, vol. 26, no. 4 (April 2007), pp. 8–9; REN21, Renewables 2007 Global Status Report: A Pre-Publication Summary for the UNFCCC COP13 (Paris: December 2007).

3 EBITDA is not a recognized measure under Canadian generally accepted accounting principles (GAAP). The Company’s management believes that, in addition to net income (loss), EBITDA is a useful supplemental measure as it provides investors with an indication of cash available for distribution prior to debt service, past pension service obligations, capital expenditures, income taxes and restructuring cash payments. Investors should be cautioned, however, that EBITDA should not be construed as an alternative to net income determined in accordance with GAAP as an indicator of the Company’s profitability. Also, EBITDA should not be construed as an alternative to cash flows from operating, investing and financing activities as a measure of liquidity and cash flows. The Company’s method of calculating EBITDA may differ from other companies and, accordingly, EBITDA may not be comparable to measures used by other companies. EBITDA is calculated in the manner as described in the Management’s Discussion and Analysis included in this Annual Report.

4 Gross profit is not a recognized measure under GAAP. The Company’s management believes that in addition to net income (loss), gross profit is a useful supplemental measure as it provides investors with an indication of the profits generated on products sold to customers before corporate overhead expenses. Investors should be cautioned, however, that gross profit should not be construed as an alternative to net income determined in accordance with GAAP as an indicator of the Company’s profitability. The Company’s method of calculating gross profit may differ from other companies and accordingly, gross profit may not be comparable to measures used by other companies. Gross profit is calculated in the manner as described in the Management’s Discussion and Analysis included in this Annual Report.