Open spaces have significant importance in the life of the settlements. The areas with high green coverage rate have ecological and environmental importance. These green spaces can improve the urban climate, abate the urban heat- island effect by their ecological-balancer function and reduce environmental damages. In recent years, less attention has been paid to open spaces (including green areas and green spaces) and their components as well as their effect on the environment. Due to mega transit projects environment of Lahore is continuously in danger. This research have highlighted the importance of green spaces which is destroyed badly after every project. Research have also highlighted the socio economic conditions, willingness of residents of Lahore where the project of orange line was initiated. In the end of the research the authors have proposed some useful measures through which planners and engineers can hold on projects and will provide less harm to environment.