The main causes of smog are:_____.
A、emission from high-pollution enterprises
B、emission from automobile exhaust
C、fire coal for heating in winter
D、burning straw
绿色经济与中国实践

章节列表

1. Ecological and Environmental Issues.102. Textbooks and Practice103. Research Hotspots and Cutting Edge Research104. Circular Economy105. Low-Carbon Economy106. Green Economy107. Sustainable Development108. Ecosystem Services109. Ecological Footprint1010. Environmental Policy Assessment9Final Exam50