What are an example of a social cost and a social benefit of preserving a meadow instead of building a new arena?

A social cost of preserving a meadow instead of building a new arena could be the potential loss of economic activity and job creation associated with the arena's development. Conversely, a social benefit of preserving the meadow is the enhancement of community well-being through increased access to green space for recreation, biodiversity, and improved air quality, which can foster a sense of community and promote mental health.