The main purpose of this legislation is to update the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, commonly known as the Superfund law, to better address the impacts of climate change. The goal is to ensure that environmental cleanup efforts consider the potential effects of climate-related events, such as natural disasters and extreme weather, on human health and the environment. Key provisions of the legislation include specific amendments that require the consideration of climate change when assessing environmental risks.