Due to the rapid depletion of fossil fuel reserves and increasing concern for climate change as a result of greenhouse gas effect, every country is looking for ways to develop eco-friendly renewable energy sources. Wind energy has become a good option due to its comparative economic advantages and environment friendly aspects. But there is always an ongoing debate if wind energy is as green as it seems to appear. Wind turbines once installed do not produce any greenhouse gases during operation, but it can and may produce significant emissions during manufacture, transport, installation and disposal stages. To determine the exact amount of emissions, it is necessary to consider all the stages for a wind turbine from manufacture to disposal. Life Cycle Analysis (LCA) is a technique that determines the energy consumption, emission of greenhouse gases and other environmental impacts of a product or system throughout the life cycle stages. The various approaches that have been used in the literature for the LCA of wind turbines have many discrepancies among the results, the main reason(s) being different investigators used different parameters and boundary conditions, and thus comparisons are difficult. In this paper, the influence of different parameters such as turbine size, technology (geared or gearbox less), recycling, medium of transport, different locations, orientation of the blade (horizontal or vertical), blade material, positioning of wind turbine (land, coastal or offshore), etc. on greenhouse gas emissions and embodied energy is studied using the available data from exhaustive search of literature. This provides tools to find better solutions for power production in an environmental friendly manner by selecting a proper blade orientation technique, with suitable blade material, technology, recycling techniques and suitable location.
 Akashi, O., Hijioka, Y., Masui, T., Hanaoka, T. and Kainuma, M. (2012) GHG Emission Scenarios in Asia and the World: The Key Technologies for Significant Reduction. Energy Economics, 34, S346-S358.
 The U.S. Department of Energy (2008) 20% Wind Energy by 2030, Increasing Wind Energy’s Contribution U.S. Electricity Supply.
 Pehnt, M. (2006) Dynamic Life Cycle Assessment of Renewable Energy Technologies. Renewable Energy, 31, 55-71.
 Crawford, R.H. (2009) Life Cycle Energy and Greenhouse Emissions Analysis of Wind Turbines and the Effect of Size on Energy Yield. Renewable and Sustainable Energy Reviews, 13, 2653-2660.
 Tremeac, B. and Meunier, F. (2009) Life Cycle Analysis of 4.5 MW and 250 W Wind Turbines. Renewable and Sustainable Energy Reviews, 13, 2104-2110.
 Kabir, M.R., Rooke B., Dassanayake, M. and Fleck, B.A. (2012) Comparative Life Cycle Energy, Emission, and Economic Analysis of 100 kW Nameplate Wind Power Generation. Renewable Energy, 37, 133-141.
 Demir, N. and Taskin, A. (2013) Life Cycle Assessment of Wind Turbines in Pinarbasi-Kayseri. Journal of Cleaner Production, 54, 253-263.
 Guezuraga, B., Zauner, R. and Polz, W. (2011) Life Cycle Assessment of Two Different 2 MW Class Wind Turbine. Renewable Energy, 37, 37-44.
 Martinez, E., Sanz, F., Pellegrini, S., Jimenez, E. and Blanco, J. (2009) Life Cycle Assessment of a Multi-Megawatt Wind Turbine. Renewable Energy, 34, 667-673.
 Martinez, E., Jimenez, E., Blanco, J. and Sanz, F. (2010) LCA Sensitivity Analysis of a Multi-Megawatt Wind Turbine. Applied Energy, 87, 2293-2303.
 Uddin, S. and Kumar, S. (2014) Energy, Emissions and Environmental Impact Analysis of Wind Turbine Using Life Cycle Assessment Technique. Cleaner Production, 69, 153-164.
 Lenzen, M. and Wachsmann, U. (2004) Wind Turbines in Brazil and Germany: An Example of Geographical Variability in Life-Cycle Assessment. Applied Energy, 77, 119-130.
 Angelakoglou, K., Botsaris, P. and Gaidajis, G. (2013) Issues Regarding Wind Turbines Positioning: A Benchmark Study with the Application of the Life Cycle Approach. Sustainable Energy Technologies and Assessments, 5, 7-18.
 Schleisner, L. (2000) Life Cycle Assessment of a Wind Farm and Related Externalities. Renewable Energy, 20, 279- 288.
 Wang, Y. and Sun, T. (2012) Life Cycle Assessment of CO2, Emissions from Wind Power Plants: Methodology and Case Studies. Renewable Energy, 43, 30-36.
 Gervasio, H., Rebelo, C., Moura, A., Veljkovic, M. and Silva, L. (2014) Comparative Life Cycle Assessment of Tubular Wind Towers and Foundations—Part 2: Life Cycle Analysis. Engineering Structures, 74, 292-299.
 Snyder, B. and Kaiser, M. (2009) Ecological and Economic Cost-Benefit Analysis of Offshore Wind Energy. Renewable Energy, 34, 1567-1578.
 Vestas Wind Systems A/S. (2011) Life Cycle Assessment of Electricity Production from a V112 Turbine Wind Plant.