A Bank of America analysis found that more investors were interested in the green bond tranche.

Fortune 100 company is able to pay a reduced rate and not have to worry about the capital costs really frees them up on the corporate sustainability side and the treasury side in innovative ways, according to BoA and Citi.

Internal carbon taxes and self-directed controls that pay for many efficiency and renewable energy projects is the key. Not relying on grants, tax or government. Microsoft, Apple, Starbucks are examples of such innovations.