{"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":"37f8009e0e594cb851f421872d3a0198c35f8a44364a879e4451eb973d24f64a"}