We use the impersonal passive to present information in a more formal way. The structure is used with verbs of perception such as think, know, say, understood, expect, see, and conclude.
It is known that competition helps investment.
It can be seen that this method is the most successful.
The first part of the sentence is passive and the second part remains the same as the original base sentence.
It is expected that rock launches will increase.
Rocket launches will increase.