This will, however, require a quantum increase in support for research and deployment in a relatively neglected area. In order for macrolevel gains to be reaped from end-use efficiencies, it is important that improved energy efficiency not be allowed to become the basis for an increase in activity and consumption in developed countries and that such increases be permitted only in countries that are still overcoming energy and income deficits. Most experts concur that Governments, in particular advanced economies, should promote the development of a broad portfolio of technologies (including renewables such as solar, wind, geothermal and hydropower) along the full chain of technology development (research, development and demonstration, market formation, diffusion and commercial adaptation). Most developing countries may opt for a more focused portfolio, given that their entry into energy technological transformation would take place at mature stages of the process.