MPSC PYQ

Carbon footprint

Carbon footprint is a Environment concept from the MPSC syllabus, tested in 5 past MPSC questions across 5 exam years between 2017 and 2025. Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.

Real questions
5
Years tested
5 · 2017–2025
In context
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What you need to know first

Basic energy resourcesGreenhouse gasesBasic renewable energy typesChemical composition of biogas

Real questions that test this

Bottled Water and Its Environmental Cost The next time you buy a bottle of drinking water, you need to pause and think. You may not bat an eyelid shelling out ₹ 15 for a litre of bottled water but what you don't realise is that you are actually paying over 4,200 times of what you normally pay for a litre of tap water. The economics of drinking water has always baffled me. What is perplexing is that the average urban middle class squirms and protests if the Delhi Jal Board, for instance, tries to 'nominally' raise the price of tap water. Paying a little over one paise for three litres of tap water (DJB prices tap water at ₹ 3.50 per 1000 litres) they feel they are already being made to pay through the nose. Price being of little constraint for the consumers, the global bottled water industry is galloping. In 2004, the world consumed 154 billion litres, of which India's share was 5.1 billion litres. Expected to grow at 40 percent annually, the ₹ 1,800-crore bottle water industry is experiencing unprecedented boom with over 1200 water factories doing business throughout the country. If you think bottled water assures you of purity and safety, it is time you think again. Even in the U.S., despite strict quality norms formulated by the Food and Drug Administration, it is safely assumed that nearly 40 percent of the bottled water is repacked pipe water. Shockingly, what is little known is that more than five litres of water is required to produce every litre of packed water. In other words, 770 billion litres of water were used to produce and pack the 154 billion litres of water that the world consumed in 2004. What a colossal waste ! Bottled water also has additional, hidden environmental costs. According to the Pacific Institute in California, the entire process of making plastic for the bottles requires huge energy. In America alone, where nearly 26 billion litres of bottled water was consumed in 2004, an equivalent of 20 million barrels of oil was

संयुक्त संस्थानांत दरवर्षी बाटलीबंद पाण्याचे उत्पादन करण्यासाठी आणि त्याची वाहतूक करण्यासाठी किती पिंपे तेलची गरज असते ? In U.S., how many barrels of oil is required every year to manufacture and transport the bottled water ?

a)10 दशलक्ष / 10 million
b)20 दशलक्ष / 20 million✓ Correct
c)5 दशलक्ष / 5 million
d)2 दशलक्ष / 2 million

Studies show that producing and transporting bottled water in the U.S. consumes massive amounts of energy, specifically around 17-20 million barrels of oil annually.

ऊर्जा उत्पादनासाठी खालीलपैकी कोणता/ते पर्याय कोणत्याही स्वरूपात कार्बनचा वापर करीत नाहीत ?

(a)लाकुड

(b)बायोगॅस

(c)भूऔष्णिक स्रोत

(d)कोळसा

1)अ आणि ब दोन्ही
2)ब आणि क दोन्ही
3)फक्त क✓ Correct
4)फक्त ड

Geothermal energy (भूऔष्णिक स्रोत) is harnessed from the earth's internal heat and does not involve the combustion of carbon or release of greenhouse gases, unlike wood, biogas (which contains methane), and coal.

हरीतगृह परिणाम म्हणजे काय ? तापमान बदलास कोणती कारणे परिणामकारक आहेत ? वरीलपैकी कोणते विधान/विधाने बरोबर आहेत ? What is green house effect ? And what are the reasons for climate change ? Which of the statement given is/are correct ?

(a)हा हरीतगृहामध्ये सौरकिरणोत्सर्गास परवानगी देऊन आढळणारा एक तापमानवाढ प्रभाव आहे.

(b)हरीतगृहातील उष्णता एक तास सूर्यप्रकाशात पार्क केलेल्या कारच्या आतील भागासारखी असते.

(c)समशितोष्ण भागात उष्णकटीबंधीय वनस्पती वाढविण्यासाठी हरीतगृहाचा वापर केला जातो.

(d)हरीतगृह परिणामांमुळे रात्री उबदार होतात.

1)A फक्त
2)A आणि B फक्त
3)A, B आणि D
4)A, B, C आणि D✓ Correct

All the statements (A, B, C, D) correctly describe aspects of the greenhouse effect, including solar radiation trapping, the greenhouse car analogy, usage in temperate regions for tropical plants, and the phenomenon of warmer nights.

For the past few centuries Earth has been witnessing several environmental problems even-though the ongoing climate change events such as increasing temperature, cloud bursts, frequent cyclones, long and irregular winters and drought have received more attention in the public platforms. These extreme climatic events have challenged the physical, mental and economic health of humans and made them to think and speak out. This realisation has been following by several agencies making efforts to mitigate the climate change impacts. It is known that global warming is the result of the incessant release of greenhouse gases especially carbon dioxide (CO₂) from several sectors especially from automobile and associated industries triggering the extreme climatic events. Earlier the natural forests cover and oceans absorbed the enormous quantities of CO₂ released in the environment. However, continuous deforestation and other anthropogenic pressures prevailing in and around the ocean and forest have slowed down the carbon sequestration potential of these systems. Natural forests evolve due to the constant interplay of inter and intra species alongwith unique environmental conditions and play an important role in mitigating the greenhouse gases to a large extent, also acting as oxygen factories. However, in comparison, tropical and savannah forests produce a more oxygen than other forests. Studies have established that the natural regeneration potential of the forest has been decreasing due to continuous deforestation. Ecologists opine that the restoration of natural forests is the ideal way to overcome the global warming impacts. However, restoration of natural forest is a herculean task and almost impossible. The diminishing forest cover affects the life-forms and also carbon storage and oxygen production which might speed-up the global warming process, and so researchers and policymakers encourage afforestation programmes in order to mitigate the global warming.

हरित गृह वायु उत्सर्जित करण्याकरिता खालीलपैकी कोणते दोन पर्याय प्रामुख्याने कारणीभूत आहेत ? Which of the following two conditions are specially responsible for the emission of greenhouse gases ?

(a)आटोमोबाईल उद्योग / Automobile industries

(b)श्रेणी जमीन व्यवस्थापन / Rangeland Management

(c)रासायनिक उद्योग / Chemical Industries

(d)पावसाचे पाणी साठवण / Rainwater harvesting

1)फक्त (अ) व (ब) / Only (a) and (b)
2)फक्त (अ) व (क) / Only (a) and (c)✓ Correct
3)फक्त (ब) व (ड) / Only (b) and (d)
4)फक्त (ब) व (क) / Only (b) and (c)

Automobile industries (releasing fossil fuel emissions) and chemical industries are major contributors to greenhouse gas emissions, making statements (अ) and (क) correct.

खालीलपैकी कोणत्या मानवी परिणामांमुळे जागतिक हवामानात बदल होतो ? The impact of humans on global climate has been induced by which of the following ?

(a)8000 वर्षापासून होणारी जंगलतोड / Deforestation since 8000 years

(b)आग आणि अतिचरण ह्यांचा वापर / Use of fire and overgrazing

(c)5000 वर्षापासून होणारी खाचरातली भातशेती / Wet paddy cultivation since 5000 years

(d)औद्योगिक क्रांती / Industrial revolution

1)फक्त ड / Only d
2)फक्त क आणि ड / Only c and d
3)फक्त ब, क आणि ड / Only b, c and d
4)वरीलपैकी सर्व / All of the above✓ Correct

Human impacts on global climate include historical activities like ancient deforestation, agriculture (paddy fields), fire/overgrazing, and modern industrialization.

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