When David Roberts announced he was taking a year-long sabbatical not only from his post writing for Grist about energy politics, but also Twitter, some felt it was a reflection of how polarized the climate debate could be online. Equally however, this reflected the amount of time, energy, thought and emotion Roberts put into his blogging and Twitter activity, which is also why, for some, his sabbatical left a gap. Before he left, Roberts penned some reflections on his work covering climate and energy: “There are no crime scenes, no explosive revelations, no sudden shifts, just… PDFs. Lots and lots of PDFs. Climate change is just puttering along.” Anyway, Roberts is due to come back from sabbatical next September, refreshed for a new season of climate talks and ready to critique how we’ve been puttering on in his absence. Follow @drgrist to see what he has to offer.