Results: How can one person save billions and kill millions?

Have you ever heard to Fritz Haber, a German chemist, who created two world shaking inventions?

Dr. Haber created a process that converted atmospheric nitrogen into ammonia making it possible for fertilizers to be manufacturers in huge quantities. As a result food harvests were increased greatly and billions were saved from starvation. It is estimated that half of all food produced at this time benefits from Dr. Haber's process. Were you aware of this invention?

Did you know he had invented poison gas?