Your first slide should include the following:

Your names?

Whether you are for or against the Dam being built.

This slide should give the audience some information about your background. Remember you are in character. The information included here will be developed through your own imagination.

Where do you live?

What is your job?

How will the Dam affect your life?

You might like to include a map but make sure you use labels and arrows.The site of my village

Using pictures is a good idea, but again use labels if you can and try and use persuasive words.

These rare trees only grow in this part of Thailand, do you really want them to be lost forever

The rest of your slides should focus on the advantages or disadvantages of the Dam. (This obviously depends on your character).

Try to use headings and key words, along with pictures, maps and graphs. These are useful in supplementing your speech.

Remember that everybody must speak.

A nice way to end your presentation is use a catchy phrase/slogan.