Complex sentence: Firstly the nature of the courses themselves, which tend to be characterised by uneven fairways, thick rough and small deep bunkers known as "pot bunkers"; and secondly, due to their coastal location and lack of trees, many links courses are frequently windy.
Split into simpler sentences: Firstly the nature of the courses themselves, which tend to be characterised by uneven fairways, thick rough and small deep bunkers known as "pot bunkers". Secondly, due to their coastal location and lack of trees, many links courses are frequently windy.