Correct answer: (c) I, II and III
Explanation
- A
I and II only
I and II only. That drops aviation e-fuels. DAC carbon plus hydrogen is a standard Power-to-Liquid route.
- B
III only
III only. Sequestration and use in plastics/food are also correct, not only aviation.
- C
I, II and III
I, II and III. DAC pulls CO2 from ambient air. That CO2 can be stored (sequestration), used as a carbon feedstock in plastics and in food-grade carbonation, or combined with hydrogen to make synthetic aviation fuel.
- D
None of the above statements is correct
None. All three uses are on the technology tree.
Summary. Official key is (c): Direct Air Capture can sequester CO2, feed plastics and food processing, and supply carbon for aviation e-fuels. (a) drops aviation; (b) keeps only aviation; (d) empties a technology that does all three.
PYQ trend
When UPSC asked this
Related PYQs from other years, newest first. Open a question to read it.
-
2021 · Q17 · General Studies · 2 marks
Why is there a concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into environment. 2. The copper slag can cause the leaching of some heavy metals into environment. 3. They may release sulphur dioxide as a pollutant. Select the correct answer using the code given below -
2020 · Q78 · General Studies · 2 marks
In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint? 1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement Select the correct answer using the code given below: -
2018 · Q35 · General Studies · 2 marks
With reference to the 'Global Alliance for Climate-Smart Agriculture (GACSA)', which of the following statements is/are correct? 1. GACSA is an outcome of the Climate Summit held in Paris in 2015. 2. Membership of GACSA does not create any binding obligations. 3. India was instrumental in the creation of GACSA. Select the correct answer using the code given below: -
2017 · Q14 · General Studies · 2 marks
In the context of solving pollution problems, what is/are the advantage/advantages of bioremediation technique? 1. It is a technique for cleaning up pollution by enhancing the same biodegradation process that occurs in nature. 2. Any contaminant with heavy metals such as cadmium and lead can be readily and completely treated by bioremediation using microorganisms. 3. Genetic engineering can be used to create microorganisms specifically designed for bioremediation. Select the correct answer using the code given below: -
2016 · Q13 · General Studies · 2 marks
What is/are the importance/importances of the 'United Nations Convention to Combat Desertification'? 1. It aims to promote effective action through innovative national programmes and supportive international partnerships. 2. It has a special/particular focus on South Asia and North Africa regions, and its Secretariat facilitates the allocation of major portion of financial resources to these regions. 3. It is committed to a bottom-up approach, encouraging the participation of local people in combating the desertification. Select the correct answer using the code given below -
2016 · Q27 · General Studies · 2 marks
The FAO accords the status of 'Globally Important Agricultural Heritage System (GIAHS)' to traditional agricultural systems. What is the overall goal of this initiative? 1. To provide modern technology, training in modern farming methods and financial support to local communities of identified GIAHS so as to greatly enhance their agricultural productivity. 2. To identify and safeguard eco-friendly traditional farm practices and their associated landscapes, agricultural biodiversity and knowledge systems of the local communities. 3. To provide Geographical Indication status to all the varieties of agricultural produce in such identified GIAHS. Select the correct answer using the code given below -
2016 · Q86 · General Studies · 2 marks
In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index? 1. Carbon dioxide 2. Carbon monoxide 3. Nitrogen dioxide 4. Sulfur dioxide 5. Methane Select the correct answer using the code given below -
2015 · Q74 · General Studies · 2 marks
With reference to 'Forest Carbon Partnership Facility', which of the following statements is/are correct? 1. It is a global partnership of governments, businesses, civil society and indigenous peoples. 2. It provides financial aid to universities, individual scientists and institutions involved in scientific forestry research to develop eco-friendly and climate adaptation technologies for sustainable forest management. 3. It assists the countries in their 'REDD+ (Reducing Emissions from Deforestation +)' efforts by providing them financial and technical assistance. Select the correct answer using the code given below