message: describe the repo
diff: # blockchain-carbon-accounting
  +
  +This repository contains the code for the [Hyperledger Carbon Accounting and Neutrality Working Group](https://wiki.hyperledger.org/display/CASIG/Carbon+Accounting+and+Certification+Working+Group). Each
  +sub-folder is for a different project of the Working Group and has its own code and instructions:
  +
  + * utility-emissions-channel: [Utility Emissions Channel](https://wiki.hyperledger.org/display/CASIG/Utility+Emissions+Channel)
  +
  +
  