Unit 1 Company Unit 2 Career Unit 3 Global Environmental Problems and Solutions Unit 4 International Communication and Cooperation Unit 5 Introduction to Environmental Science Unit 6 Water Pollution and Water Treatment Unit 7 Air Pollution Prevention and Control Unit 8 Contaminated Sites Remediation Unit 9 Environmental Monitoring Unit 10 Energy Resources Unit 11 Waste Management Unit 12 Environmental Equipment Unit 13 Environmental Impact Assessment and Environmental Audit Unit 14 Environmental Laws and Regulations Unit 15 Sustainable Development