McDonald's faced challenges in the early 1990s as sales flattened domestically and competitors increased. To address criticism of its environmental impact, McDonald's partnered with the Environmental Defense Fund to explore more sustainable operations. Key to McDonald's future success will be maintaining quality and consistency while experimenting with new options to appeal to changing tastes, and potentially expanding internationally where growth opportunities are greater. The document discusses McDonald's history, operations, challenges, environmental initiatives, and strategies to sustain future prosperity.