earth hour: tranquil city skyline with power-efficient buildings and iconic landmarks illuminated by soft glow, candles

sustainability environment landmarks energy consumption low light conservation urban landscape stargazing candles windows city skyline darkness renewable modern architecture innovation sustainable living nighttime cityscape night sky electricity view silhouettes soft glow in iconic powerefficient buildings global warming energysaving development peaceful ecoconscious pollution illuminated energyefficient ecofriendly earth hour tranquil technology