Air Pollution Prevention

4.3

4.2

4.4

4.3

4.5

4.3

4.2

3.6

4.3

4.1

4.6

4.1

4

4.1

4.1

4.3

4.1

4.4

4.1

3.9

4.4

4.6

4.2

4.2

4.2

4.3

4.2

4.7

4.2

4

4.5

3.8

4.1

4