Obama’s top science adviser, John Holdren, is right and wrong.
Yes, we will need fossil fuels for some time and some (gas) could be better than others (if pipeline leakage is reduced).
But no, being “gradual, modest” and “realistic” isn’t enough.
Advocating decarbonisation in the latter half of the century is likely to mean warming of 2-3C which could result in major systemic risk. Governments could be doing much more to engage major investors to be #forcefulstewards and push the pace of change.