Complex sentence: Its grass airstrip was sacrificed to the planting of more palms following the construction of a concrete airstrip on nereby Union Island but its circular air traffic control building remains although it is now used as a nursery for young palms.
Split into simpler sentences: Its grass airstrip was sacrificed to the planting of more palms following the construction of a concrete airstrip on Union Island. The circular air traffic control building remains although it is now used as a nursery for young palms.