The presidency of Donald Trump brought significant changes to environmental policies in the United States, marking a shift that has reverberated through various sectors. His administration's environmental agenda was characterized by a strong focus on deregulation, particularly in areas previously addressed by the Obama administration. The most notable actions included the withdrawal from the Paris Agreement, which signaled a retreat from international climate commitments, and the rolling back of the Clean Power Plan, a key initiative aimed at reducing greenhouse gas emissions from power plants. These decisions underscored a broader trend of prioritizing economic growth over environmental protections, often justified by claims of job creation in industries such as fossil fuels. Furthermore, Trump’s policies had profound implications for climate change regulations, particularly regarding air and water quality standards. The administration's moves to deregulate emissions standards contributed to a deterioration in air quality, particularly in urban areas, leading to increased health risks for residents. Additionally, the focus on fossil fuels hindered the growth of renewable energy initiatives, particularly solar and wind energy, which faced obstacles in the form of reduced federal support and incentives. This environment of deregulation not only affected current energy practices but also set a precedent that could influence future policy decisions. The real-world implications of these policies are evident in several case studies related to air quality and wildlife conservation. For instance, urban areas experienced heightened pollution levels, leading to a resurgence of respiratory issues among the population. Furthermore, conservation efforts faced setbacks as protections for endangered species were weakened, posing threats to biodiversity and habitat preservation. These outcomes illustrate the tangible effects of Trump's environmental policies, raising concerns among scientists and environmental advocates alike. Public response to these shifts has been marked by increased activism and grassroots movements advocating for stronger environmental protections. As awareness of climate change grows, there are predictions of potential policy shifts under future administrations, suggesting that the current trajectory may not be permanent. The need for a robust environmental advocacy framework remains critical as citizens seek to influence policy and protect the planet for future generations.