Green tech investors want to put their money behind firms with the potential to disrupt their industries and bring both positive environmental impacts and financial success. But what’s disruptive is by its nature unprecedented and unpredictable. How do investors assess the potential of a green technology company?

Nature abhors a vacuum. Air invades emptiness. Water floods open space. What happens when a wall is breached and markets are allowed to enter countries where they’d previously been banned? In the 1990s, Rosemary Ripley participated in the infusion of private enterprise into former command economies.