Green city development principles (GCDP) implementation level and its effects on lagos megacity residents' well-being, Nigeria: A qualitative study.

Cities are subject to rapid urbanisation, climate change and environmental challenges. Lagos, being the 4th most populous city in the world and Africa, is also facing these challenges. The study investigates the impact of implementing the green city development principle (GCDP) as a framework to enhance residents' well-being in Lagos, Nigeria. The instruments used were an In-Depth Interview (IDI) guide, an observation schedule and a GCDP checklist to determine the Lagos Megacity implementation level. The interpretivist and constructivist paradigms were engaged as the research philosophy. The findings present several obstacles that hinder GCDP's practical implementation and the relationship between GCDP implementation and residents' well-being in a megacity. Based on the findings, the study provides recommendations for policymakers and urban planners to enhance the effectiveness of GCDP implementation and promote sustainable urban development in Lagos while endorsing GCDP initiatives to improve well-being in cities.