[en] The present revision of the PEN consists of two parts, a diagnosis and a strategy. In the diagnosis; the evolution and the changes are analyzed foreseen in the international and national environments to establish the form like the energy sector is affected and it responds to these conditions. In second part it revises the strategy to incorporate the required adjustments of agreement with the changes in the environment, the demand perspectives and sector and national politics limits. In the international thing, the process of transformation of the system economic World cup will contribute to strengthen the liberalization actions, deregulation and privatization of the economies of the development countries. Great part of the dynamics growth, will be sustained then in the private investment and in an atmosphere of global competition. The formation of regional blocks opens favorable perspectives for new cooperation forms and development of resources. In the case of the American hemisphere and with reference to the energy sector, one has an important potential to improve the self-sufficiency starting from regional supplies, especially starting from fossil resources. This expectation is important for Colombia that has well-known reservations and important potentials in these resources. The tendencies waited in the fossil resources are more favorable for the countries than they can have reservations and growing production of petroleum and of natural gas. Nevertheless, the development of the coal maintains favorable expectations, but with important requirements as for efficiency and quality in the production that it guarantee the positioning in a more and more concerned market. In the environmental thing, the growth foreseen in the consumption of fossil fuels also bears to the increment in the 2010 in the greenhouse gases, at levels between 36% and 49% superiors to those of 1990. That most of this increment will originate in the in the development countries and particularly in China. In the national thing, inside the growth of the GDP, the most dynamic sector in the last years has been the energy-mining sector that 11.5% increased in 1996. This dynamics of growth has originated basically in the increments of investments in exploration and development of petroleum and coal from final of the years 70, which have been in corresponding increases in petroleum, natural gas and coal production. In this period the non-alone country recovered the energy self-sufficiency, but rather it became an important actor in the world market of petroleum and of coal. The invigoration of the production and export of petroleum and coal, as processed products, also arise as alternative to maintain the economic growth in the short and medium term and to give the investment resources that guarantee the recovery of other sectors and the diversification of the economy for a quick, sustained and equal development in the medium one and it release term. Of another part, the final consumption of energy is associated with the level and growth of the economic activity, with a relationship near energy-GDP to the unit. Between 1975 and 1996 the energy consumption 3.6% annual average grew, in comparison with 4.1 annual % of the GDP. This way then, for the Colombia case, the energy sector has today in day a double strategic character, so much from the point of view of the expectations of economic growth, as of the supply of the intermediate and final demands of energy that it are required to maintain and to consolidate this growth and to improve the levels of the whole population's well-being