Readers want to know that you have considered your position carefully.
Like an interlocking framework, all the sentences work together; even a small shift in one sentence could affect all the others.
For example, let us stay with the paragraph on global warming.
Titles that begin with "How" or "Why" promise that you will explain something worth understanding.
Similarly, presenting a question in the title is basically a promise that you will provide some sort of answer in the essay. A common practice in writing titles is to give two versions of the title separated by a colon.
The First Sentence The first sentence of an essay must be award-winning. Just as in the title, the content of the first sentence should prepare the reader to learn your perspective on your topic. Remember that early drafts of your first sentence should be just enough to get you started as you write and revise.
It can be short, medium, or long, but it must orient the reader in terms of tone, content, and language. This means, again, choosing a level of specificity that is not too broad. You can spend time focusing on the first sentence after you have a solid command of your argument and a perfect feel for the tone of your essay which may not be until you have written several drafts.
Meeting the Deadline Usually there is no real difference between submitting your essay weeks in advance and sending it by express mail on the last day.
An office assistant will put your essay in the pile for your readers, all the same.
Use it to start preparing your readers for the "trip" that you have designed for their benefit. Do not get bogged down before the rest of the essay is in place.
The First Paragraph In a great opening paragraph, every sentence does significant work.