Commitment IRR Rate of Return Short-term 
Harvard Business Review
FEBRUARY 7, 2012
And the commitment to green energy has helped Walmart take third place on the U.S. For example] the longer term payback on solar helps us get to scale down the road.". In short, Walmart has tweaked its ROI requirements for green power initiatives to reflect more of the big picture. look at where the investment gets us.
Harvard Business Review
SEPTEMBER 24, 2014
It’s a perfect storm bringing us to two important tipping points: one of belief and commitment to action, and one of economics. This week, an important coalition of coalitions, We Mean Business , launched with its own report and commitment by large organizations to recognize the reality of climate science and the ability to act on it.
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