Why is it bad to build on greenfield site?

Building on greenfield sites can lead to significant environmental degradation, as it often involves destroying natural habitats and ecosystems. This development can contribute to wildlife displacement, loss of biodiversity, and increased carbon emissions due to the loss of vegetation that absorbs CO2. Additionally, it can strain local resources, such as water supplies, and lead to urban sprawl, making sustainable development more challenging. Opting for brownfield redevelopment, on the other hand, can revitalize existing areas while minimizing these negative impacts.