Match the following:
Column A
1. CO
2. nitrogen fixation
3. nitrification
4. decomposers
5. oxide of N and S
6. weathering
7. leaching
8. ozone depletion


Column B
(a) Rhizobium
(b) Nitrobacter
(c) acid rain
(d) automobile exhaust
(e) mineralisation
(f)skin cancer
(g) depletion of soil fertility
(h) soil formation