Which of the following statements is correct?
- A$CFC$s are discharged in the lower part of the atmosphere,move upward,and reach the stratosphere.
- BThe Montreal Protocol was signed to reduce $CO_2$ emissions.
- CAn ozone hole is a small pore created in the tropospheric ozone layer.
- DJhum cultivation is a method of afforestation.
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Where was the attempt to treat wastewater by combining artificial and natural processes carried out?
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$I-$ Reducing the use of fossil fuels.
$II-$ Improving energy efficiency.
$III-$ Deforestation.
$IV-$ Afforestation.
$V-$ Increasing human population growth.
$I-$ Reducing the use of fossil fuels.
$II-$ Improving energy efficiency.
$III-$ Deforestation.
$IV-$ Afforestation.
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Match the items in Column $A$ with those in Column $B$:
\tau\tau\tau\tau\tau\tauColumn $A$ \tau\tau\tauColumn $B$ \tau\tau \tau\tau\tau\tau\tau$(A)$ Catalytic converter \tau\tau\tau$(i)$ Particulate matter \tau\tau \tau\tau\tau\tau\tau$(B)$ Electrostatic precipitator \tau\tau\tau$(ii)$ Carbon monoxide and nitrogen oxides \tau\tau \tau\tau\tau\tau\tau$(C)$ Earmuffs \tau\tau\tau$(iii)$ High noise level \tau\tau \tau\tau\tau\tau\tau$(D)$ Landfills \tau\tau\tau$(iv)$ Solid waste \tau\tau \tau
| Column $A$ | \tau\tau\tauColumn $B$ | \tau\tau
| $(A)$ Catalytic converter | \tau\tau\tau$(i)$ Particulate matter | \tau\tau
| $(B)$ Electrostatic precipitator | \tau\tau\tau$(ii)$ Carbon monoxide and nitrogen oxides | \tau\tau
| $(C)$ Earmuffs | \tau\tau\tau$(iii)$ High noise level | \tau\tau
| $(D)$ Landfills | \tau\tau\tau$(iv)$ Solid waste | \tau\tau
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