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Topic– Conservation, environmental pollution and degradation, environmental impact assessment
7) According to IPCC report, unless net carbon dioxide emissions are brought down to zero by 2050, warming above 1.5°C is practically inevitable. Discuss.(250 words)
Why this question
The recent IPCC report has highlighted the gravity of situation with regard to the impending climate and environmental disaster due to global warming. In this context it is essential to discuss the need to bring down carbon emissions by 2050.
Discuss- this is an all-encompassing directive which mandates us to write in detail about the key demand of the question. we also have to discuss about the related and important aspects of the question in order to bring out a complete picture of the issue in hand.
Key demand of the question
The question wants us to write in detail about the recent IPCC report and its findings in connection with the need to bring down carbon emissions by 2050 so as to limit the global warming to 1.5 degrees celsius above pre industrial levels.
Structure of the answer
Introduction– write a few introductory lines about the recent IPCC report. E.g The Intergovernmental Panel on Climate Change (IPCC) Special Report on 1.5°C (SR 1.5) is unequivocal in its assertion—unless net carbon dioxide (CO2) emissions are brought down to zero by 2050, warming above 1.5°C is practically inevitable.
Body– Discuss the related findings of the report in detail. E.g A 1.5°C warmer world will see higher sea levels, higher temperatures and increase in frequency and intensity of precipitation, floods, droughts and heatwaves. At 1.5°C, the world would reach some critical thresholds beyond which natural ecosystems would fundamentally change and, in some cases, take millennia to recover; The thresholds for irreversible, multi-millennial loss of ice sheets in Greenland and the West Antarctica may also be breached. The warming and acidification of the ocean will cause 70-90 per cent loss of corals and will put the survival of many marine species in jeopardy; Simulations included in the SR 1.5 show that when considering global mean surface temperature, the world has a total remaining carbon budget of just 770 gigatonnes of CO2, starting from the beginning of 2018, before it breaches 1.5°C, according to the median value of the simulations. At current emission levels, without the removal of CO2 from the atmosphere, this budget would be exhausted by 2040; The simulations also show that limiting global warming to 1.5°C with little or no overshoot would require net anthropogenic CO2 emissions to reduce by up to 45 per cent, relative to 2010 levels, by 2030 and attain net-zero CO2 emissions by 2050 etc.
Conclusion– based on your discussion, form a fair and a balanced conclusion on the given issue.