The debate on grid expansion often revolves around the question of which design is best. Overhead and underground power lines both have their advantages and disadvantages as far as installing and operating them is concerned.

workers on the top of an electricity pylon

In weighing up the pros and cons, environmental factors, security of supply and not least the costs all play a role. The decision as to whether an overhead or an underground line is more appropriate can only be made after careful consideration of these aspects as well as the local circumstances.

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