All questions of Environment Pollution for SSC CGL Exam

Understanding Greenhouse Gases
Greenhouse gases play a crucial role in the Earth's atmosphere by trapping heat and contributing to the greenhouse effect, which is essential for maintaining a habitable climate. Among these gases, carbon dioxide (CO2) is the primary greenhouse gas responsible for climate change.
Why Carbon Dioxide (CO2)?
- Significant Contributor:
Carbon dioxide is the most abundant anthropogenic greenhouse gas, accounting for approximately 76% of global greenhouse gas emissions from human activities.
- Sources:
Major sources of CO2 emissions include:
- Burning fossil fuels (coal, oil, and natural gas) for energy.
- Deforestation, which reduces the number of trees that can absorb CO2.
- Industrial processes, such as cement production.
- Longevity in the Atmosphere:
CO2 has a long atmospheric lifetime, remaining in the atmosphere for centuries, which exacerbates its impact on global warming.
The Role of Other Gases
While other gases like chlorofluorocarbons (CFCs), carbon monoxide (CO), and ozone also contribute to the greenhouse effect, they are not as prominent as CO2.
- CFCs:
Primarily responsible for ozone depletion, they are present in smaller quantities and have been largely regulated.
- Carbon Monoxide (CO):
While it can indirectly affect climate by influencing atmospheric chemistry, it is not a direct greenhouse gas like CO2.
- Ozone:
Ground-level ozone is a pollutant that contributes to warming but is not emitted directly; its formation is a result of reactions between other pollutants.
Conclusion
In summary, carbon dioxide (CO2) is the primary greenhouse gas due to its abundance, long-term effects, and significant role in anthropogenic climate change. Understanding its impact is essential in addressing global warming and implementing effective climate policies.

Putrescibility is the process of decomposition of organic matter in water by microorganisms using oxygen. Understanding terms related to water pollution and remediation processes is essential for effective environmental science knowledge.