The efforts that are required to achieve a global equilibrium between sources and sinks by the middle of the century will require efforts that need to be maintained through long periods of time. While the growth rate of mitigation levels in many places around the world are decreasing, countries are still emitting GHG, while impacts are likely to continue increasing.  To adapt to this, short- and medium-term policy must be continuously adapted to long term objectives.  The project development of long-term visions, coupled to the backcasting of the trajectories from them towards the present, buttressed by policies and projects, seeks to enable pathways that enable efforts that align short and long term needs.