If you want to prevent yourself from being bias you must not base anything off of your opinion, or what you think is the right answer.
Everything must be strictly facts with no intention of trying to persuade the reader. If you truly believe that you need something in your paper, make sure you can support your claim with actual facts (it is very important that you back up all of your claims with actual facts)
Refrain from using things like:
•In my opinion
•I think
•I believe
•I know
•Everyone knows that
Do stones for her drains and little stoppers to keep leaves and dirt from entering the water that goes to diff plants and sewers
They lose aater when it evropares but at the same time they gain water when it rains