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Protecting the Planet: 2021 Highlights Oyster Shell Recycling Oysters are natural filters of the sea and can also act as natural buffers against sea level rise and storm surge events. However, over the years, overfishing and improper treatment of waterways have been detrimental to oyster populations across the U.S. This has diminished their ability to clean water or buffer against the impacts of climate change. To contribute to oyster regeneration, in 2017 the culinary and food and beverage teams at MGM National Harbor started to collect oyster shells for restoration projects in the Chesapeake Bay. In subsequent years the program was expanded to our Las Vegas resorts, and we have now been collecting oyster shells at multiple properties for many years. In 2021, as an evolution of this program, we established a partnership with The Nature Conservancy in Mississippi, and shipped approximately 45,000 pounds of dry shells from Las Vegas to the Southern State. Our MGM Resorts shells are playing a vital role in The Nature Conservancy’s feasibility study for oyster habitats in the Gulf Coast, and we expect this may Consumptive Water Use help establish the state’s first oyster restoration project. We support the rehabilitation and rewilding of this vulnerable ecosystem because we are committed to supporting projects that One of the findings of our climate risk assessment was that MGM Resorts is exposed to water deliver multiple environmental benefits. And, since our Beau Rivage Casino & Resort is based in stress in our primary market of Las Vegas. This is because the U.S. Southwest is facing a this region, we seek to support the communities in which we operate. sustained drought and our main water basin of Lake Mead is under pressure from multiple sources, but primarily from outside Nevada. To do our part to help mitigate this risk within our region, we have implemented extensive water efficiency and conservation efforts over the last 10 years. In fact, by 2019 had already achieved our 2025 water goal to reduce water per square foot by 30% from a 2007 base year, helping avoid the use of over 5 billion gallons in the process. We have now reset that goal to 33% by 2025, from the same base year. While we will continue efforts to reduce water use overall, an interesting and under-appreciated aspect of water management in Southern Nevada is that practically all the water used inside buildings, including inside all our properties, is recycled and returned back to its source, Lake Mead. As such, the more valuable water conservation efforts relate to water use outdoors since that use is “consumptive.” To reduce consumptive use to date, our focus has been on converting real grass to drought tolerant landscaping and have nearly completed that effort with over 200,000 feet converted so far. In 2021, we engaged independent water experts to conduct detailed analysis on consumptive water use drivers and through a combination of actual data and modeled estimates, determined that cooling towers were another major driver of consumptive use. As such, we plan to increase installation of sub-meters across cooling towers, and have started to install more modern and water-efficient cooling towers in multiple locations. We also expect to announce a consumptive water use reduction goal for Las Vegas cooling towers, once we have metered data and a more accurate baseline data for this important subset of our consumptive water footprint. MGM Resorts International / mgmresorts.com/ESG 17

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