The need for infrastructure investment around the globe is climbing. In emerging markets, population growth, increasing urbanization, and rising per capita incomes are driving the demand for new roads, power stations, schools, and water delivery systems. In the developed world, including the United States, significant reinvestment in aging infrastructures is becoming urgent. But this need for infrastructure investment comes in the wake of a financial crisis that has severely constrained public budgets in many countries. The result: a staggering gap of approximately $1 trillion to $1.5 trillion annually between demand and investment in infrastructure.