Here is a link to the Small Business Administration's (SBA) Green Business Case Studies web page (scroll down to find links). Pick one of the major cities that are highlighted, click on that city and then read about a few of businesses in that city that has successful gone Green. What do they have in common? What are they doing to create sustainability within their city and beyond?
https://www.sba.gov/managing-business/running-business/green-business-guide/green-business-case-studies