Unit 1 The Internet 1
Unit 2 The Internet Technologies 9
Unit 3 Email 17
Unit 4 Globalization 25
Unit 5 Drug Problems 32
Unit 6 AIDS 41
Unit 7 Mad Cow Disease 50
Unit 8 Foot-and-Mouth Disease 57
Unit 9 Air Pollution 65
Unit 10 Water Pollution 73
Unit 11 Water Disposal 81
Unit 12 Global Warming 89
Unit 13 Smoking and Health 99
Unit 14 Obesity 108
Unit 15 Fast Food 116
Unit 16 Healthy Diets 124
Unit 17 Human Cloning 132
Unit 18 The WTO 139
Unit 19 The WTO and China 147
Unit 20 The Rise of China 155
Unit Summaries 163