Scenarios of high greenhouse gas emission reduction in transports and buildings by 2050

The authors report simulations of different environmental policy measures concerning transports and buildings in France. First, they review measures which may entail a reduction of greenhouse gas emissions, and comment their emission reduction potential and their implementation costs. These measures are then ranked, and only those presenting a significant potential and an economically and technologically feasibility are finally considered. Their impact is then simulated by using different models which are adapted to the both sectors and to time ranges. The obtained results are compared to those obtained with a calibrated trend scenario and with a 'factor 4' scenario