| http://www.w3.org/ns/prov#value | - Equipment such as parking meters, traffic warning signs, street lighting, or wireless Internet gateways may be powered by a small wind turbine, possibly combined with a photovoltaic system, that charges a small battery replacing the need for a connection to the power grid.[155]A Carbon Trust study into the potential of small-scale wind energy in the UK, published in 2010, found that small wind tur
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