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| Column $A$ | Column $B$ |
| $(a)$ Catalytic converter | $(i)$ Particulate matter |
| $(b)$ Electrostatic precipitator | $(ii)$ Carbon monoxide and nitrogen oxides |
| $(c)$ Earmuffs | $(iii)$ High noise level |
| $(d)$ Landfills | $(iv)$ Solid wastes |
| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Small fish | $(1) \;25 \;ppm$ |
| $(b)$ Zooplankton | $(2) \;2 \;ppm$ |
| $(c)$ Fish-eating birds | $(3) \;0.5 \;ppm$ |
| $(d)$ Large fishes | $(4) \;0.04 \;ppm$ |
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