Wind energy has the least environmental impact in terms of greenhouse gas emissions.

Wind energy produces the least environmental impact in terms of greenhouse gas emissions compared to coal, natural gas, and oil. Wind turbines generate electricity without burning fossil fuels, which means they do not release carbon dioxide (CO₂) or other greenhouse gases during operation. While there are emissions associated with the manufacturing and installation of wind turbines, these are minimal compared to the emissions produced by fossil fuel-based power generation. Wind energy is considered a clean, renewable resource that plays a crucial role in reducing the overall carbon footprint of the energy sector and mitigating climate change.