The $CO_2$ content of the atmosphere has increased in the last $150$ years from:
- A$25$ to $35$ ppm
- B$270$ to $340$ ppm
- C$0.027$ to $0.34$ ppm
- D$0.2$ to $0.3$ ppm
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Match the columns:
Column-$I$ Column-$II$ $(1)$ Arsenic $(a)$ Minamata disease $(2)$ Nitrate $(b)$ Itai-itai disease $(3)$ Mercury $(c)$ Blue baby syndrome $(4)$ Cadmium $(d)$ Skeletal fluorosis $(5)$ Fluoride $(e)$ Black foot disease
| Column-$I$ | Column-$II$ |
|---|---|
| $(1)$ Arsenic | $(a)$ Minamata disease |
| $(2)$ Nitrate | $(b)$ Itai-itai disease |
| $(3)$ Mercury | $(c)$ Blue baby syndrome |
| $(4)$ Cadmium | $(d)$ Skeletal fluorosis |
| $(5)$ Fluoride | $(e)$ Black foot disease |
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