It has to something new with science, technology, nature, medicine, education, ect

I need a topic that would be easy to present to the class my object is to compel the listeners to want to receive the information and create desire to know more.

This takes 50% topic and 50% on how I sell the information to them.

Needs to be 5 to 7 minutes and i need 4-7 sources.

What would you recommend for a topic?

The applications of cheap 3D printing in the developing world. Easy topic to find information on, combination of humanitarian and technological effort so good scope, easy to talk about while still being new information to many.

any other ideas

i would just use that one. 3d printing is almost unheard of by most people so telling people they will one day be able to download a shoe file and print out a new shoe at home will get peoples attention.

alright cool ill start my research on it soon