{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to environmental protection?","a":"Carbon Emission Trading: Blockchain technology can be used for the trading of  carbon emission rights, achieving decentralized allocation and transaction of carbon emission rights, improving transaction efficiency and reducing transaction costs."}]}],"pr":"3e9f770f92d306ea1cf0b7630dc562f5402479ebdd462c9ac822401a6fdd1a5a"}