Grammar -> Semicolons 1
Some words that we write need a stronger pause before them than that provided by a comma. Examples of these types of words are: however, therefore, also, moreover, furthermore, hence, subsequently and consequently.
Further examples showing semicolon usage:
1) She is a wonderful chef; therefore we must consider her for the job.
2) He loves camping; furthermore he can afford to go on the trip.
3) I love English; hence I've decided to study Literature at university.
In the above examples the words 'therefore', 'furthermore' and 'hence' need to remain strong in the sentences. They need a strong pause before them and this is done through the use of the semicolon.