I am in the business of foresight, projections and scenarios. As a scientist I cannot tell you what the future brings nor what our world will be under +2, 4 or 6 degree warming. What I can say, is that as an individual I have deep concerns.
The climate change community has been applying scenario techniques to bridge gaps between the physical and social change that is envisioned due to climate change. The most recent addition is the introduction of so-called Shared Socioeconomic Pathways (SSPs) to describe alternate world futures (O’Neill et al., 2015). These futures can be coupled with different representative concentration pathways (RCPs) that correspond to the language of “+2/4/6… degree warming”. Despite the level of emissions or warming considered under a given pathway, what is clear, is that most of the scenarios pose challenges for our societies in the 21st century.