Original sentence: Haaf Gruney is notable for being a national nature reserve.The island's name is a corruption of the Norse hafgröney , gröney meaning "green island", and "ha(a)f" being an old word (still in some use in Shetland), meaning deep open water, especially that used for fishing.There was formerly a chromate mine here.This is because storm petrels breed here
Edited sentence: Haaf Gruney is a National Nature Reserve for the storm petrels which breed there.The island's name is a corruption of the Norse hafgröney, gröney meaning "green island", and "ha(a)f" being an old word (still in some use in Shetland), meaning deep open water, especially that used for fishing.There was formerly a chromate mine