At the World Economic Forum’s annual meeting two years ago, Alibaba Group president J. Michael Evans touted his company’s development of an “individual carbon footprint tracker” to monitor what people eat, what they buy, and where they travel. True North’s Andrew Lawton ran into Evans this year in Davos and asked him if he thinks such tracking is the way of the future. Evans was a lot more coy this time around, saying he was “just discussing it as an idea.”