This review paper provides a comprehensive assessment of the environmental impacts associated with a variety of energy sources. The analysis examines fossil fuels, renewables, and nuclear energy on key ecological metrics including emissions, pollution, habitat disruption, and lifecycle resource usage.
Fossil fuels remain a major contributor to greenhouse gas emissions, air and water pollution, and ecosystem damage. Coal and oil in particular show persistent environmental burdens that extend beyond carbon dioxide into toxic waste and heavy metal release.
Renewable energy sources, including solar, wind, and hydro, demonstrate clearer advantages in emissions reductions, but they are not without challenges. Manufacturing and disposal of photovoltaic cells, turbine blades, and batteries introduce materials and energy costs that must be factored into their full lifecycle footprint.
Nuclear power offers low operational emissions, but questions remain over long-term waste management and potential accident scenarios. Biomass can be carbon neutral under some conditions but can also lead to deforestation and land-use change that undermines its sustainability goals.
The paper argues that no single energy source is universally superior; rather, achieving sustainability requires diversified portfolios, policy incentives, efficiency improvements, and careful lifecycle accounting. Decision makers must balance immediate energy needs with ecological responsibilities to arrive at a truly sustainable energy future.