This paper critically examines the interrelationship between population growth and climate change, emphasizing the profound environmental and socio-economic impacts on human populations. Population growth exacerbates environmental degradation, contributing to resource depletion, greenhouse gas emissions, and biodiversity loss, which in turn intensifies climate change. Conversely, climate change directly affects populations by threatening health, livelihoods, food security, and prompting large-scale migration, particularly in vulnerable regions. The disproportionate impact on developing countries and marginalized communities highlights the need for climate justice and equitable solutions. This paper explores the health risks, economic impacts, and migration patterns driven by climate change, and evaluates the socio-economic inequalities exacerbated by both phenomena. It concludes by offering a range of recommendations, including the integration of climate adaptation into development plans, increased investment in climate resilience, sustainable population growth through education and family planning, and global cooperation to ensure climate justice. Urgent, coordinated action is required to mitigate the environmental and societal impacts of population growth and climate change, fostering a sustainable future for all.