Explore the environmental impact of Denver International Airport by examining its economic activities, particularly in light of recent parking fee increases aimed at funding sustainability initiatives. Discuss how these heightened fees may contribute to improvements in parking infrastructure that enhance eco-friendliness, such as better lighting and security. Delve into the broader context of sustainable practices in aviation, highlighting what other airports are doing to mitigate their environmental footprints. Consider potential consequences for both the local community and the environment if airports embrace or overlook these sustainability efforts. Conclude by reflecting on the balance between economic growth and environmental responsibility in the aviation sector.