Some writers like to begin a sentence with It, followed by the passive. For example, the following sentence concerns the options available to a woman who has been attacked:
It is considered that in the last resort it is to civil remedies that she should have recourse.
This is ‘lawyer talk’. It is better to be direct and use the active voice:
We believe that in the last resort she will have to sue her attacker.
In some situations, however, the construction can be useful:
It is believed that similar reserves exist along the coast.
The writer may well not have a clear idea of exactly whose opinion is being quoted, although it is evident that the belief is widespread or well established.
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