Energy appears to be a fundamental driving force of economic and
political strategies as well as planetary stability. Energy-related
issues such as (1) the availability of new energy sources and viable
technologies, (2) the disparity in access to energy sources, (3) the
role of energy in our societies (energy societal metabolism), (4) the
energy support to the life of our cities (where about half of world
population is going to live very soon), and (5) the energy demand for
food security all over the world, are "hot" problems that humans will
have to face within the framework of sustainability (ecologically sound
production and consumption patterns associated with socially acce- able
life styles), in terms of policies, technological development and
economic processes. A coherent energy strategy is required, addressing
both energy supply and demand, security of access, development problems,
equity, market dynamics, by also taking into account the whole energy
lifecycle including fuel production, transmission and distribution,
energy conversion, and the impact on energy equipment manufacturers and
the end-users of energy systems. Issues of energy efficiency and rebound
effect must also be taken into proper account. In the short term, the
aim should be to achieve higher energy efficiencies and increased supply
from local energy sources, in particular renewable energy sources.