The governor's call to strengthen policies such as the state's renewable portfolio standard is what the business community and investors like me have been asking for from elected leaders. My firm, Calvert Investments, was joined by nearly 300 other investors, together managing in excess of $20 trillion, calling for governments around the world to take action on climate change. To give you a sense of just how much money that is, U.S. gross domestic product last year was less than $16 trillion; these are the largest investors in the world committed to action. Just within the past few months, over 600 companies have signed the Climate Declaration. These companies included giants like General Motors, Unilever, Nestle and Intel. Their message is simple: Tackling climate change is one of America's greatest economic opportunities of the 21st century.