2025年度第1回英検　準1級　要約　解答例①

District heating is a system in which several buildings are warmed from a central source through underground pipes. It saves energy and reduces CO₂ emissions, helping to tackle global warming. The system is also considered more reliable because it is maintained regularly. However, installing district heating is regarded as too expensive for some communities and difficult, especially in urban areas, since heavy construction work is required in densely built areas.