Total Carbon Footprint and Carbon Intensity Measurement Total Carbon Footprint in COby Type and Per Metric Tonne 86% electricity 5% product deliveries 4% natural gas 2% business travel 3% refrigerants 2012 1,734,000 tonnes | CO2e 86% 5% 4% 2% 3% 2012 Corporate Social Responsibility Report | 45 The EMP is founded on the principles of ISO 14001 and United States Environmental Protection Agency (USEPA) compliance-focused environmental management system guidance.