{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology address environmental issues?","a":"Carbon  emissions trading: Blockchain technology can be used for the transaction and tracking of carbon emissions rights, helping to achieve goals of reducing carbon emissions."}]}],"pr":"e2aaeb4890531984142bf82d753b8e958fd2b9737e4a3f5e38609cd377310dd6"}