The crisis and the lowest-in-years oil prices are no good news for clean energy investments.All is not gloom, however, reports recent research at the Wharton School. The volatility of the oil price, compared to the stable foresights of renewable energy investments, might still play in favour of the latter. Top Business School Wharton regularly publishes research with intriguing insights into environmental and ethics aspects of business. A simple registration enables access to the content. Access the Business Ethics area.