reuse system will help us save an esti - mated 29.5 cubic meters of water each day, enough to fill 4.3 Olympic pools over the course of a year. 6 During construction, we plan to refurbish and reuse materials on-site to reduce waste and embodied carbon, and we will work to significantly minimize waste sent to landfill. Employee and Customer Well-Being For many years, Citi has prioritized the intersection of sustainability and employee well-being. When looking at how our buildings can affect the well-being of our employees, we manage air quality and acoustics, as well as providing ergonomic furniture, opportunities to stay active, healthy food options and a work environ - ment that is both flexible and effective. As a result of our efforts, we’ve received WELL Silver certification from the International WELL Building Institute™ for two facilities, one each in Hong Kong and India. Both facilities are going through the WELL recertification process, which is required every three years. We are also working toward WELL certification for our London headquarters renovation. The WELL Building Standard is a system for measuring, certifying and monitoring building features that impact the health and well-being of occupants. In recognition of how important it is to design buildings for employee well-being, we have included WELL certification as an aspect of our sustainable building goal for 2025. The COVID-19 pandemic further emphasized the importance of employee well-being at our office facilities, in addition to the well-being of our employees and customers within our branches. With this in mind, we have instituted initiatives and protocols aligned with the Centers for Disease Control and Prevention guidelines. These measures include improved ventilation and air treatment systems; signage about effective handwashing; sanitizer stations; enhanced cleaning measures to reduce exposure to pathogens, allergens and harmful chemicals; and rules related to social distancing and masks. In addition, we have installed plexiglass barriers in our branches to provide increased protection for our employees and customers. To further support our colleagues, we are also providing employees with additional physical and mental health resources. Employee Engagement Our colleagues contribute to our culture of sustainability through volunteer efforts and awareness campaigns. Despite the challenges a remote working environment posed during 2021, Citi piloted an Earth Day initiative within its global Green Team Network of 18 teams. This initiative encour - aged employees to live more sustainably and complete tasks to save water, reduce waste and energy consumption and learn more about climate change. 6. In one year, this equals 10,767.5 cubic meters. Olympic pool size: 2,500 cubic meters. 10,767.5/2,500 = approx. 4.3. Contents ESGatCiti SustainableFinance SustainableProgress Equitable&ResilientCommunities Talent& DEI RiskManagement&ResponsibleBusiness Appendices CITI 2021 ESG REPORT 54