The article gives a complete introduction to petroleum and explains why it is such an important energy source, but oil spills may result during transport. It focuses on the environmental harm caused by oil spills and examines a variety of factors that determine effects, such as the volume of the spill, type of oil involved, and geographical location. The paper explores existing oil spill recovery and treatment techniques such as mechanical, chemical, or biological ones. Their shortcomings are also pointed out therein. The debate also extends to the destiny of spilled oil. Natural processes involved in it include evaporation, dispersion and daily dissolution (depending on circumstances), remaining materials, degradation, etc. Technology can help man manage oil spills, but there is no technological solution to the problem of preventing them. Several case studies are given, looking at the long-term impact of oil spills on ecology. Moreover, the article discusses economic costs related to oil spills in terms of cleanup expenses, damage done by erosion of natural resources, and various losses suffered by impacted communities. Cost estimation factors such as oil quality. spill volume, location, weather conditions, and local response capacity are explored in detail herein. The study ends with a discussion of future perspectives, emphasizing such modern technologies as nanotechnology and bioremediation. The necessity of interdisciplinary research in environmental areas and the prospects for environmentally friendly materials are noted. The paper also points out the current limitations and difficulties in the prediction of best techniques for furthering biodegradation, as well as some doubts about introducing nanomaterials into marine environments. A comprehensive review finally points out that more research and determination of cost will be required to estimate the efficiency and sustainability of nanomaterials—as another cure for oil spill cleanup on a larger scale.