When we burn fossil fuels, we don’t pollute just the air but the oceans, too. Indeed, today’s seas absorb as much as a quarter of all man-made carbon emissions, which changes the pH of surface waters and leads to acidification. This problem is rapidly worsening—oceans are now acidifying faster than they have in some 300 million years. It’s estimated that by the end of this century, if we keep pace with our current emissions practices, the surface waters of the ocean could be nearly 150 percent more acidic than they are now.

Q. What leads to the acidification of oceans as per the above passage?

Extraction of oil from the sea

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Carbon dioxide emissions by marine animals

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Excess absorption of solar radiation by the oceans

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An increasing pH level in the oceans

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Solution

The correct option is D An increasing pH level in the oceans
It’s written in the passage that - “ which changes the pH of surface waters and leads to acidification”.

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Read the following passage and answer the question that follows:

When we burn fossil fuels, we don’t pollute just the air but the oceans, too. Indeed, today’s seas absorb as much as a quarter of all man-made carbon emissions, which changes the pH of surface waters and leads to acidification. This problem is rapidly worsening—oceans are now acidifying faster than they have in some 300 million years. It’s estimated that by the end of this century, if we keep pace with our current emissions practices, the surface waters of the ocean could be nearly 150 percent more acidic than they are now.

Q. Which among the following is the main theme of the above passage?

निम्नलिखित परिच्छेद को पढ़िए और प्रश्न का उत्तर दीजिए:

जब हम जीवाश्म ईंधन जलाते हैं, तो हम न केवल हवा बल्कि महासागरों को भी प्रदूषित करते हैं। वास्तव में, आज समुद्र सभी मानव निर्मित कार्बन उत्सर्जन का एक चौथाई हिस्सा अवशोषित करते हैं, जो सतही जल के pH को परिवर्तित करता है और अम्लीकरण को बढ़ावा देता है। यह समस्या तेजी से विकराल होती जा रही है— लगभग 300 मिलियन वर्षों की तुलना में महासागर अब तेजी से अम्लीकृत हो रहे हैं। ऐसा अनुमान है कि, यदि हम अपनी वर्तमान उत्सर्जन दर को बनाए रखते हैं, तो इस सदी के अंत तक समुद्र का सतही जल वर्तमान की तुलना में लगभग 150 प्रतिशत अधिक अम्लीय हो सकता है।

Q. निम्नलिखित में से कौन-सा उपर्युक्त परिच्छेद का मुख्य विषय-वस्तु है?

Q. Read the following passage and answer the question that follows:

When we burn fossil fuels, we don’t pollute just the air but the oceans, too. Indeed, today’s seas absorb as much as a quarter of all man-made carbon emissions, which changes the pH of surface waters and leads to acidification. This problem is rapidly worsening—oceans are now acidifying faster than they have in some 300 million years. It’s estimated that by the end of this century, if we keep pace with our current emissions practices, the surface waters of the ocean could be nearly 150 percent more acidic than they are now.

Q. Which among the following is the main theme of the above passage?

निम्नलिखित गद्यांश को पढ़कर प्रश्न का उत्तर दें:

जब हम जीवाश्म ईंधन को जलाते हैं, तो हम वायु को नहीं बल्कि महासागरों को भी प्रदूषित करते हैं।दरअसल, आज का समुद्र मानव निर्मित कार्बन उत्सर्जन के एक चौथाई हिस्से को अवशोषित करता है, जो सतह के पानी के पीएच को बदलता है और अम्लीयता को बढ़ाता है।यह समस्या तेजी से बढ़ रही है-महासागर 300 मिलियन वर्षों की तुलना में अब तेजी से अम्लीय हो रहे हैं।यह अनुमान लगाया गया है कि इस सदी के अंत तक, यदि हम अपनी वर्तमान उत्सर्जन प्रथाओं के साथ तालमेल बनाए रखते हैं, तो समुद्र की सतह का पानी वर्तमान की तुलना में लगभग 150 प्रतिशत अधिक अम्लीय हो सकता है।

Q. निम्नलिखित में से कौन सा गद्यांश का मुख्य विषय है?

Q. This ocean covers more than one-third of the Earth's surface and nearly half of Earth's water surface. It also has the deepest point on Earth - the Mariana Trench. Identify this ocean.

Q. 47. With reference to ocean acidification, which of the following statements are true?
i) Rising greenhouse gases are increasing ocean acidification.
ii) Productivity of corals will increase because of the increase in acidity of the ocean.
Options:

Q. At least a quarter of the World's corals have lost/ over the past 25 years and as climate change warms/ the oceans the additional carbon dioxide will make/ the water more acidic further destroying coral reefs.

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The correct option is D An increasing pH level in the oceansIt’s written in the passage that - “ which changes the pH of surface waters and leads to acidification”.

The correct option is D An increasing pH level in the oceans
It’s written in the passage that - “ which changes the pH of surface waters and leads to acidification”.