{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the applications of blockchain in the field of environmental protection?","a":"Carbon Emission Trading: Blockchain technology can  be used to record and track transactions of carbon emission rights, ensuring the authenticity, transparency, and traceability of the transactions."}]}],"pr":"d66078dc9e68d128cf254f469e967813763dd4f4a0ab7978603d46b62b2deba2"}