Many large metropolitan areas worldwide have called for an improvement in the air quality, which has deteriorated mainly due to energy systems based on fossil fuels, namely the transport sector. Hydrogen and hydrogen enriched fuels can provide an improvement in the Future. If hydrogen is produced from renewable sources, it will also contribute to the reduction of global warming. Due to the superior properties of hydrogen, with respect to efficiency and environmental characteristics, when burned in specially adapted combustion engines, gas turbines and fuel cells, the present EQHHPP phase focuses on hydrogen applications in Future potential markets related to the transport sector. The overall goal of the demonstration phase of the EQHHPP is to advance hydrogen applications. Studies on hydrogen safety, regulations and acceptability, and on socio-economic aspects of hydrogen use, will support the technological development and demonstration activities. In that framework, various demonstration projects were started in 1992, with funds coming from the European Commission, from the Government of Quebec and from industry and research centres. The demonstration projects mainly concern the utilization of hydrogen in airborne and urban transportation, the time Frame being 1992 to 1997.