passive "it is said that..'', ''people say that.."
rewrite.
1. It is known that cars pollute the environment.
Cars are known to pollute the environment.
2. It is believed that the robber has worked in the bank.
The robber is believed to have worked in the bank.
3. It is believed that she is an honest person.
She is believed to be an honest person.
4. It is thought that the president will arrive soon.
The president is thought to arrive soon.
5. People report that many passengers died in the crash.
Many passengers are reported to have died in the crash.