Date Added: Nov 2010
Green, or renewable, energy sources - biothermal, solar, wind, and others - are emerging, but too slowly to, as yet, make a noticeable impact on U.S. energy use. And therein lies a major problem facing the economy - what if green energy sources aren't ready to fill the gap when the gasoline runs out, or when the traditional electric power plants run out of fuel? The need for green-energy sources is extremely critical, yet it is a problem that is quiet, unobtrusive, and thus not the recipient of widespread media attention. It is also the type of problem that takes a long time to develop, and solutions to the problem will take a long time to implement.