This problem occurs due to people throw waste into the irrigation system.
Ok well it’s nice to use an alternative to because, but a change of cause effect signal can often mean a change of grammar.
The grammar for because is familiar to most people:
Prices increased because demand increased.
In this structure, Prices increased is an independent clause (= it can stand alone as a sentence), and demand increased is also an independent clause.
We could also think of this structure as:
because + cause sentence
The grammar for due to is slightly different:
Prices increased due to an increase in demand.
In this case Prices increased is an independent clause, while an increase in demand is a noun (or noun phrase).
Again, this structure could also be thought of as:
due to + cause noun
A common error is to treat because of in the same way as because. For example it is incorrect to say:
Prices increased because of demand increased.
Because of follows the same structure as due to:
Prices increased because of an increase in demand.
So, let’s review these three cause effect signals:
And if we apply these to our opening example then we get:
Using a combination of these in your IELTS speaking and writing will help to increase your scores in all criteria.