From the table given, determine what is the increase in pollution from 2005 to 2006 in the river that has higher pollution.
|
BOD level mg/litre |
||
|
River B in Uttaranchal |
2005 |
55 |
|
2006 |
85 |
|
|
River D in Uttaranchal |
2005 |
66 |
|
2006 |
99 |
|
1
30
2
11
3
14
4
33