La guía trata básicamente aspectos a considerar respecto a usos y fuentes de energía, señalando con variedad de esquemas y dibujos distintos tópicos que requieren atención.

The capacity factor of a power plant is the ratio of the electrical energy produced in a given period of time to the electrical energy that could have been produced at continuous maximum power operation during the same period. For a conventional fossil-fuel power station, the capacity factor is determined by planned maintenance downtime, unplanned equipment failure, and by shutdowns when the station’s electricity is not needed. For wind and solar energy, power output is also determined by the availability of wind and sunlight. The maximum power output, or ‘installed capacity’, is a rather theoretical value that is rarely reached. It would be clearer to quote the mean power for solar and wind energy, but because peak power is more commonly quoted, it’s important to know the capacity factor as well, to make sense of the peak numbers.

In 2007, domestic products accounted for 56% of the annual market, compared to 41% in 2006,” said Li Junfeng, Secretary General of the Chinese Renewable Energy Industry Association.

Concerns include the potentially destructive impact of constructing electricity infrastructure in local communities and sensitive environments, and local civic organisations have mounted highly organised campaigns to contest the project, arguing that they have been given insufficient justification for the construction of the necessary power lines. 

Financing and planning concerns also plague the project, with the level of state subsidies to the two main contracting firms - RTE (Réseau de transport électricité) and REE (Red Electrica de Espana) - still to be determined, and with questions remaining about the exact location of the future power cables.

if the interconnection is not completed, the Iberian Peninsula risks becoming an "island", cut off from the electricity potential and supply of the rest of the European continent.

As a case study of a successful approach, let’s take a look at what Spain has been able to accomplish. Spain has tackled its development of renewable energy sources aggressively. With 11,615 megawatts (MW) of installed wind capacity at the end of last year, Spain is second in the world to Germany in capacity (and about on par with the United States). The 23,372,000 MWh generated in 2006 provided just over 8.5% of Spain’s electricity: only Denmark boasts a higher percentage.

This chart shows an Aging Vulnerability Index that attempts to measure how vulnerable countries are to an aging population. The index looks at things like pensions, healthcare, numbers of younger people, education etc...