Let's have a glance at the above statement.
I think you can always improve your writing if you ADD a sentence to the end of the first paragraph, and make it a sentence that expresses the main idea of the essay. When you put a sentence like that at the end of the first paragraph, it makes the reader take notice and comprehend your message.
Mai Chu, thanks for the great edit!! I am impressed, and I hope you check out the contributor page.
Always try to be brief:
In brief, to hammer in final nail, People make convincing arguments both for and against the preservation of old buildings,
but I believe ...
:-)