What is blue carbon?
- A.Carbon captured by oceans and coastal ecosystems
- B.Carbon sequestered in forest biomass and agricultural soils
- C.Carbon contained in petroleum and natural gas
- D.Carbon present in atmosphere
Correct answer
Explanation
The correct answer is A, Carbon captured by oceans and coastal ecosystems. Blue carbon is the carbon stored by marine and coastal ecosystems, especially mangroves, salt marshes and seagrass meadows. These plants take in carbon dioxide, and because their waterlogged soils have little oxygen, dead matter decays slowly and the carbon stays locked in the sediment for hundreds or even thousands of years. Area for area, they can store several times more carbon than tropical forests, which is why protecting the Sundarbans and India's seagrass beds counts as climate action. When these habitats are cleared, the stored carbon goes back into the air. Option B is wrong because carbon held in forest biomass and farm soils is called green carbon. Option C is wrong because carbon in petroleum and natural gas is fossil carbon, which is released as carbon dioxide when burnt. Option D is wrong because carbon dioxide in the air is simply atmospheric carbon, not stored carbon. Exam tip: blue carbon means coasts and oceans, green carbon means forests and soils.
Practice Questions
View allWhich one of the following is not included in the National Air Quality Index?
- A.Sulphur
- B.Nitrogen dioxide
- C.Lead
- D.Methane
Show answer
Methane is not one of the pollutants used to calculate India's National Air Quality Index. The National Air Quality Index was launched in 2014 under the Swachh Bharat Abhiyan and is run by the Central Pollution Control Board.
Read the full explanation →Which one of the following statements about the National Green Tribunal is not correct?
- A.It was set up in the year 2010.
- B.It is involved in effective and expeditious disposal of cases relating to environmental protection and conservation of forests.
- C.It may consider giving relief and compensation for damages to persons and property.
- D.It is bound by the procedures laid down under the Code of Civil Procedure, 1908.
Show answer
The National Green Tribunal is not bound by the Code of Civil Procedure; it is guided by the principles of natural justice.
Read the full explanation →Consider the following statements about National Wildlife Action Plan (NWAP) of India for 2017-2031:
1. This is the Third National Wildlife Action Plan.
2. The NWAP is unique as this is the first time India has recognized the concerns relating to climate change impact on wildlife.
3. The NWAP has ten components.
Which of the statements given above is/are correct?
- A.1 only
- B.1 and 2 only
- C.2 and 3 only
- D.1, 2 and 3
Show answer
The plan for 2017-2031 is India's third National Wildlife Action Plan and the first to deal with the impact of climate change on wildlife, but it has five components, not ten.
Read the full explanation →Which one of the following methods is not suitable for urban rainwater harvesting?
- A.Rooftop recharge pit
- B.Recharge wells
- C.Gully plug
- D.Recharge trench
Show answer
A gully plug is a small check structure built across a natural gully or stream channel in hilly and rural land, so it has no place in a city.
Read the full explanation →The city of Cartagena, which is famous for Protocol on Biosafety, is located in
- A.Colombia
- B.Venezuela
- C.Brazil
- D.Guyana
Show answer
Cartagena is a port city on Colombia's Caribbean coast, where talks on the biosafety protocol were held in 1999. The Cartagena Protocol on Biosafety is a supplementary agreement to the Convention on Biological Diversity of 1992.
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