Physics issues investigation topic?

Hey :) I have a physics issue investigation assignment. It involves a source analysis, short essay and a powerpoint presentation. The topic has to be an issue that relates directly to physics concepts and also has an ethical issue surrounding it. An example is a topic my friend chose that was "Should the South Australian Police adopt tasers as a weapon" which would involve talking about relevant physics behind a taser and the different opinions on the issue. Any help for a topic question would be great I have lots of topics but cannot think of one that has an issue surrounding it. THANK YOU SO MUCH :D