The unprecedented oil crisis in 1973 triggered an almost global search for alternative sources of energy as well as measures aimed at conserving fuel. Most of these measures relate to transportation, as it is reported to be the world's biggest consumer of energy, especially of petroleum. Like many other developing countries that are non-oil producing the Philippines has attached a high priority to energy-saving programs. On December 13, 1973, President Marcos launched the Energy Conservation Movement and issued four decrees to discourage the wasteful consumption of fuel oil and gasoline, including one which raised registration fees for and taxes on vehicles. He urged the participation of every sector of society in this concerted drive to save energy.