…[F]or…Ben & Jerry's carbon pricing is already a reality, allowing it to pay US dairy farmers to invest in onsite renewable energy generation…as it looks to slash its supply chain emissions…Ben & Jerry's set itself an internal carbon price, the revenues from which are recycled to help farmers finance biodigesters…for each tonne of carbon a technology is expected to offset, Ben & Jerry's will pay the farmer $10 per tonne, to help reduce the upfront costs of investment…the scheme will prove attractive to farmers financially, which is of major importance for an industry that has at times struggled politically with the concept of climate change…Solheim [Ben & Jerry’s chief executive]…does hope some form of pricing agreement will be signed off before 2020…the company is already drawing up plans to campaign and lobby governments over the next decade…