If I were Mayor, I'd make the world a better place by
Create sustainable, green, homeless shelters with solar windows and rooftop gardens. Teach them how to feed themselves.
What/who changed my life and why
Al Gore's "An Inconvenient Truth". It explained things in black and white for me and from then on, I couldn't continue living the way I had been. It has forced me to make changes in all areas of my life.