Greenhouse gas emission evaluation and barrier of implementing modular construction buildings

The construction industry's impact on greenhouse gases (GHG) is irrefutable. Many researchers have investigated a diverse range of approaches to alleviate this impact. One approach is to prefabricate building modules for later assembly on site. The rationale for this is based on the assumed efficiencies of work conducted under factory conditions. However, there is little agreement on the importance of prefabricated construction techniques as methods of reducing GHG emissions. Herein, most of the evaluations of modular buildings are limited to their construction stage. To address this, a bibliometric analysis was used to a quantitatively review relevant literature. This chapter plotted the scientific research outputs on sustainable prefabricated construction. Out of 1,420, only 367 keywords from the 24 articles met the threshold and were analyzed. Results of this review suggest substantial gaps in knowledge about the cost and social impact of the modular building need further evaluation. Meantime, end of life impact of the modular building is still seeking further investigations. However, GHG topics gained considerable attention from 2008 to 2021, according to the results. However, the publication rate of modular related to GHG is negligible compared to a building. The assessment of modular construction reluctance has shown some barriers. The main barrier to the implementation of modular construction is high initial cost and transportation difficulty. These factors need significant attention in future research.