keywords I should use
Yes, great place to start.
Well, are we talking about renewable energy? If that is what you mean, search the database for it in " " marks: "renewable energy"
Search also for:
"nuclear energy" benefits risks
efficient energy use
decrease consumption energy
Google this: top 10 renewable energy sources
How to get the outline:
Write one paragraph about each article
When you have several paragraphs, look at them to see if there is a theme that is common to all of them... something that connects them together.
Write about that theme as your thesis statement.