绿色家园PDF电子书下载

Unit 1 What Is the Environment? 1

1-1 What Is the Environment?　 2

1-2 The Living and Non-living Environment 4

1-3 The Natural and Man-made Environment　 5

1-4 Human Influence on Nature 7

Unit 2 Recycling 10

2-1 What Is Recycling? 11

2-2 How Can We Recycle? 13

2-3 What Is Rubbish? 15

2-4 5Rs 18

Unit 3 Saving Energy 22

3-1 Humans Cannot Live without Energy 24

3-2 What Is Energy? 26

3-3 Energy and the Environment 30

3-4 Solutions for a Sustainable Future 32

3-5 Energy-efficient Labels 35

Unit 4 We Want Cleaner Air! 38

4-1 All Living Things Need Air to Live 39

4-2 Air Pollution 41

4-3 Indoor Health 44

Unit 5 Biodiversity 47

5-1 What Is Biodiversity? 48

5-2 Why Is Biodiversity Important? 52

5-3 Why Are We Losing Biodiversity? 53

5-4 How Can We Protect Biod iversity? 55

Unit 6 Music or Noise? 58

6-1 What Is Noise? 59

6-2 Major Noise Sources 60

6-3 Health Effects of Noise 60

6-4 Noise Measurement 61

6-5 Noise Control 65

Unit 7 Water and You 68

7-1 Water Is Vital to All Life 70

7-2 Where Does Our Household Water Come from and Go to? 72

7-3 Is Water Abundant or Scarce? 74

7-4 Water Pollution 77

7-5 Water Conservation 78