{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied in the environmental protection field?","a":"Environmental Monitoring and Protection:  Blockchain technology can be used for real-time monitoring of environmental factors such as air quality, water"}]}],"pr":"363b949389dbc1629e145b4fc899841a26a7c1317416dc0b0a157256c1beb974"}