STEVE ALLEN / SCIENCE PHOTO LIBRARY STEVE ALLEN / SCIENCE PHOTO LIBRARY
Wind turbine. Electricity-generating three-blade wind turbine. Wind power is one of the leading forms of 'alternative' clean energy as it creates no emissions to threaten the environment. This form of energy is, however, subject to vagaries of the weather so it is best viewed as a means of reducing dependence on fossil fuel or nuclear power rather than as a replacement. Photographed in the United Kingdom.
Model release not required. Property release not required.