This paper investigates the role of G20 declarations in shaping sustainable futures through the lens of global economic and environmental governance. The G20, as a prominent multilateral forum, has been pivotal in shaping international discourse on sustainable development, economic growth, and climate action. The study explores how the G20 declarations have evolved over time, with a particular focus on their impact on global policy, sustainability goals, and cooperation among member nations. By evaluating key declarations, this paper assesses both the successes and challenges in the G20’s contribution to sustainable global futures.