In 2021, Citi Tower Hong Kong installed our largest on-site renewable energy system to date. This hybrid system generates energy for water heating and electricity. The system includes 360 solar panels, which we estimate will generate over 85,000 kilowatt-hours annually, avoiding 70 metric tons of CO 2 emissions each year. The site also has a small wind turbine. With the installation of solar panels for two more locations completed in 2021, we now have six bank branches in Mexico with on-site solar generation. These branches receive from 60% to 80% of their electricity needs from on-site solar power, including the branch pictured at right in Mexico City. The six branches have a total of 348 solar panels and a combined capacity of 115 kilowatts when operating at their peak output. In 2021, these sites produced 64,000 kilowatt-hours of electricity. Sustainable Building Principles in Action Whether undertaking new construction or renovating existing buildings, we prioritize efficiency and sustainability, to minimize the environmental impact of our facilities across the globe. Buildings are responsible for about 40% of global energy use and approximately one-third of GHG emissions. 2 Since our own operations consist largely of buildings, we have developed and are pilot - ing requirements for all new buildings to be zero carbon by 2030, in support of our net zero commitments. These requirements address both operational and embodied carbon emissions, inclusive of energy use, energy supply, integration with utilities and material use. Citi is currently renovating a facility in Gray, Tennessee, to align with our zero- carbon requirements. The plans for this facility include features to reduce energy use as much as possible and to meet any remaining energy needs with renewable sources. Aligning this building with our zero-carbon building requirements will also benefit the well-being of those using the building. For instance, a tight building seal will improve air quality and thermal comfort for those inside and will also improve energy efficiency. One of our 2025 goals is to have 40% of our facilities, by floor area, LEED, WELL or equivalent certified. In 2021, we earned certifications for several sustainable build - ing projects in pursuit of this goal: • Guatemala (LEED Gold): Reducing the environmental impact of the interior construction of our offices in Guatemala was instrumental in our ability to achieve LEED Gold for this site. Design features include high-efficiency fixtures and equipment to reduce water consumption by 41.5% and electrical 2. United Nations Environment Programme, “ Energy Efficiency for Buildings ,” page 1, accessed November 2021. Contents ESGatCiti SustainableFinance SustainableProgress Equitable&ResilientCommunities Talent& DEI RiskManagement&ResponsibleBusiness Appendices CITI 2021 ESG REPORT 52