Question

Global warming is a consequence of the ________ effect caused by the ________ levels of carbon dioxide.

• A. greenhouse
• B. rising

Answer 1

Global warming:

1. It is a process of continuous increase in the average temperature of the Earth due to a gradual rise in the greenhouse effect.
   • Greenhouse effect: The process in which the gases such as carbon dioxide$\left({\mathrm{CO}}_2\right)$, chlorofluorocarbons$\left(\mathrm{CFCs}\right)$, water vapor$\left({\mathrm{H}}_2\mathrm{O}\right)$, methane$\left({\mathrm{CH}}_4\right)$, and, ozone$\left({\mathrm{O}}_3\right)$ trap the heat radiations coming from the sun through space and prevent radiation from leaving the Earth's atmosphere completely into space resulting in the warming of the Earth's surface.
2. It is a long-term phenomenon.
3. With increasing pollution, the concentration of greenhouse gases is on the rise.
4. Out of all the greenhouse gases, ${\mathrm{CO}}_2$is present in the highest concentration.

Final answer: Global warming is a consequence of the greenhouse effect caused by the rising levels of carbon dioxide.