{"id":638,"date":"2023-06-13T13:40:22","date_gmt":"2023-06-13T08:10:22","guid":{"rendered":"https:\/\/lotusarise.com\/qna\/?p=638"},"modified":"2024-04-03T07:07:03","modified_gmt":"2024-04-03T01:37:03","slug":"q-the-scientific-view-is-that-the-increase-in-global-temperature-should-not-exceed-2c-above-pre-industrial-level-if-the-global-temperature-increases-beyond-3c-above-the-pre-industrial-le","status":"publish","type":"post","link":"https:\/\/lotusarise.com\/qna\/upsc\/q-the-scientific-view-is-that-the-increase-in-global-temperature-should-not-exceed-2c-above-pre-industrial-level-if-the-global-temperature-increases-beyond-3c-above-the-pre-industrial-le","title":{"rendered":"Q. The scientific view is that the increase in global temperature should not exceed 2\u00b0C above pre-industrial level. If the global temperature increases beyond 3\u00b0C above the pre-industrial level, what can be its possible impact\/impacts on the world?"},"content":{"rendered":"\n
    \n
  1. Terrestrial biosphere tends toward a net carbon source.<\/li>\n\n\n\n
  2. Widespread coral mortality will occur.<\/li>\n\n\n\n
  3. All the global wetlands will permanently<\/strong> disappear.<\/li>\n\n\n\n
  4. Cultivation of cereals will not be possible anywhere<\/strong> in the world.<\/li>\n<\/ol>\n\n\n\n

    Select the correct answer using the code given below.<\/p>\n\n\n\n

      \n
    • 1 only<\/li>\n\n\n\n
    • 1 and 2 only<\/li>\n\n\n\n
    • 2, 3 and 4 only<\/li>\n\n\n\n
    • 1, 2, 3 and 4<\/li>\n<\/ul>\n\n\n\n
      \n

      Answer: (b) 1 and 2 only<\/strong><\/p>\n<\/blockquote>\n\n\n\n

      Notes:<\/h3>\n\n\n\n
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      • Terrestrial biosphere<\/strong>\n
          \n
        • It has an important role in regulating atmospheric composition and climate.<\/li>\n\n\n\n
        • It can release or absorb the greenhouse gases, carbon dioxide (CO2<\/sub>), methane (CH4<\/sub>) and nitrous oxide (N2<\/sub>O).<\/li>\n\n\n\n
        • It regulates fluxes of energy, water and aerosols between the earth surface and atmosphere.<\/li>\n\n\n\n
        • Carbon is exchanged most quickly with the atmosphere, although small amounts of carbon leave the terrestrial biosphere and enter the oceans as dissolved organic carbon.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • If the global temperature increases beyond 3 \u00b0C above the pre-industrial level, the terrestrial biosphere tends toward a net carbon source.<\/strong> Taiga and temperate forests act as an important carbon sink; these forests would turn into a carbon source.<\/li>\n\n\n\n
        • Corals<\/strong>\n
            \n
          • These are invertebrate animals belonging to a large group of colourful and fascinating animals called Cnidaria. <\/li>\n\n\n\n
          • Coral reefs are extremely diverse marine ecosystems hosting over 4,000 species of fish, massive numbers of cnidarians, molluscs, crustaceans, and many other animals.<\/li>\n\n\n\n
          • As temperatures rise, mass coral bleaching events occur. If the temperature keeps on rising, widespread coral mortality will occur.<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • The temperate regions can still survive if the temperature increases. The temperate zones are where the widest seasonal changes occur. The vegetation can survive there.<\/strong><\/li>\n\n\n\n
          • The weather should be warm and moist during the early stage of growth of cereals. Hence, the cultivation of cereals would still be possible if the temperature rises.<\/strong><\/li>\n<\/ul>\n\n\n