{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Does blockchain technology have a positive impact on environmental protection?","a":"Carbon emission trading: Blockchain technology can be used for the transaction  and tracking of carbon emission rights. By constructing a transparent and tamper-proof system, blockchain technology can help governments and companies achieve their carbon reduction goals more effectively."}]}],"pr":"74bc1cd8d02236da2c3fbd90a8452876bcd10c9d2c87190ff96e692474d737eb"}