Alternative energy. Alternative energy is any energy source that is an alternative to fossil fuel. These alternatives are intended to address concerns about such fossil fuels, such as its high carbon dioxide emissions, an important factor in global warming.
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Techopedia explains Permanent Virtual Circuit (PVC) A PVC is designed to eliminate the need to set up a call connection on frame relay, ATM or X.25 networks. Typically, the physical connections of a frame relay or supported network into various virtual circuits (VC) allow a physical connection to support multiple VCs simultaneously.