Climate change litigation and environmental law have become fundamental tools for tackling the urgent issues of our day. This article examines how they work together to advance international sustainability initiatives. We go into the foundations of environmental legislation, sits development, and the global accords dictating how we as a society should face to environmental problems. Then, we examine developing area of climate change litigation, outlining significant cases and their repercussions.        This shows that how environmental law and climate change litigation are complex related, demonstrating how they work in tandem to influence environmental policy, safeguard ecosystems, and hold governments and businesses liabilities. We also explore the difficulties that these legal paths must overcome, including standing, causality, and political opposition. Among these difficulties, environmental law and climate change lawsuits have made significant progress towards reducing environmental degradation and promoting sustainable practices.  It is becoming very clear that these legal instruments are essential tools in our quest of a more sustainable and resilient planet as the world deals with the mounting problems of climate change and environmental degradation.