Whether they are trying to reduce global warming, improve food distribution, or even revolutionize "communication protocols" [1], what are startups that you, the Hacker News reader think will change the world, or are currently changing the world? I encourage you to put your own startup if you think it will change the world.[1] http://online.wsj.com/articles/yo-this-app-isnt-so-dumb-1407714995