A Change of Thought

Although I love swimming and have a passion for it, I feel that I don't have much to write about it.  I was thinking about doing my personal project on the positive and negative effects/benefits of swimming but I feel that it mightcbe boring.  I might want to change my topic to something I have a lot to talk about and that I also have a passion for.  Besides sports I probably want to do something that can cause change and help people around the world.  Maybe I can do something that can respond to conflicts around the world.  Any ideas?