(N/A) Global warming is the increase in the Earth's temperature due to the rise in the concentration of greenhouse gases like $CO_2, CH_4,$ and $CFCs$ in the atmosphere.
Effects: $(i)$ The increase in temperature causes the melting of polar ice caps,leading to a rise in sea levels.
$(ii)$ Global warming leads to explosive weed growth,increased plant diseases,and higher pest populations. These factors result in reduced crop yields in tropical and subtropical regions.
Control Measures: $(i)$ Reduce deforestation and promote reforestation.
$(ii)$ Plant more trees.
$(iii)$ Limit the use of fossil fuels by utilizing alternative sources of energy.
$(iv)$ Control the human population growth.