The 4 per 1000 initiative (the French government’s campaign — 4 grams increase of soil carbon per year in every kilogram of farmed earth) remains the best game in town, whether your town is Paris, Marrakech, or in 2017, Bonn. It would, in the French government's theory (supported by IPCC's notion of a "carbon budget" but called into question by the latest report cards from the Tyndall Centre and others) be enough to hold climate change at 1.5 degrees, if universally adopted.
That 2014 COP-20 proposal, “Soil for food security and climate” became part of the “Lima-Paris Action Agenda” and then, two weeks ago at COP-22, the “Global Climate Action Agenda,” but the word 'soil' only made it once into the Marrakech Action Proclamation at the end of COP-22, and that was in reference to the venue being "on African soil." The word 'agriculture' was completely absent.
However, if you read the outcome document liberally to assume the Nationally Determined Contributions (NDC), or the UN's pledge system, constitutes the action agenda at present, then there may still be some hope.
While the 4 per 1000 initiative gained no new additions to the 37 nations who endorsed in Paris, many NDPs are starting to reflect the realization that putting carbon back in the ground might be a cheap way to meet their goals. This includes the United States, which last May issued a “Climate Smart” agriculture and forestry plan. The word 'biochar' does not appear in that 60-page plan. Pyrolysis is only mentioned in the context of a way to reduce methane from concentrated animal farming wastes. This is the US-DUH, remember?
The influence of heroic biochar researcher Hans Peter Schmidt was evident at the margins of the event, where Swiss biotech company Zaluvida Corporate AG pitched for venture capital from business leaders to support its natural solution to reduce methane emissions in cows, Mootral(TM). Mootral is a feed supplement made from biochar infused with garlic and citric extract. Just 10 grams a day reduces bovine flatulence 30 percent while increasing weight gain and lactose production. According to the literature handed out by Zaluvida, feeding every cow a daily dose of Mootral would be the same as taking 200 million cars off the road. An antibiotic version is scheduled for release next year after it receives patent approval.