5. Adam Lowry and Eric Ryan, Method: The two childhood friends Adam Lowry, who was working as a climate scientist and Eric Ryan, who was working in an advertising firm, decided to resign from their respective jobs to build up the environmentally friendly cleaning product company called “Method.” The duo researched and started Method in 2000. The company now has become one of the fastest-growing private companies in the United States. They have 100 of products, including soaps, dish soaps and bathroom cleaners. Method has gross revenue worth of $100 million.