Low carbon economy: Low carbon economic policy Carbon trading Carbon finance Carbon asset management Carbon accounting International relations and climate negotiations Green low-carbon technology environmental science Environmental economy Energy economy carbon emission Low carbon enterprise management Low carbon supply chain management Environmental Protection Law Environmental resources: water resources management Soil remediation Solid waste management Air pollution prevention climate change Wastewater discharge management Water quality modeling Industrial wastewater treatment Ecosystem restoration Biofiltration of harmful gases Eco city construction Ecological environment monitoring Environmental ecology Environmental protection materials environmental effect