This essay delves into the critical issue of climate change and its devastating effects on the Great Barrier Reef, the world's largest coral reef system. It begins by introducing the concept of climate change and its broad impacts, highlighting the Great Barrier Reef's vulnerability. The main body of the essay explores the causes of climate change, particularly global warming and the role of greenhouse gases, and how these factors contribute to rising ocean temperatures, coral bleaching, and ocean acidification. The essay also examines the observed impacts, including the widespread coral bleaching events and the acceleration of extreme weather events. Furthermore, the essay emphasizes the need for immediate action, suggesting strategies like recycling, promoting eco-friendly practices, educating the public, and encouraging the use of renewable energy sources to address the threats. The essay concludes by reiterating the severity of climate change and the urgent need for governmental and individual efforts to protect the Great Barrier Reef and mitigate the environmental consequences.