Carbon Budget - Environment Notes

Carbon budget is the total quantity of carbon dioxide (CO2) emissions allowed over time to stay under a specific temperature threshold. The goal is to achieve net-zero emissions, which means establishing an equal balance between carbon emitted into the atmosphere and carbon removed from it. The notion of a "Carbon Budget" evolved gradually as a result of the work of the Intergovernmental Panel on Climate Change (IPCC), which emphasised the link between global warming and accumulated CO2 emissions during the industrial period. This article explains about the Carbon budget which is important for UPSC IAS exam preparation.

What is the Carbon Budget?

• A carbon budget is defined in climate science as the amount of greenhouse gases that can be spent (emitted) for a particular degree of global warming.
• A carbon budget is the greatest amount of cumulative net global human carbon dioxide (CO2) emissions that, with a high likelihood, would restrict global warming to a specific level.
• The overall carbon budget is stated in terms of pre-industrial levels.
• It is the maximum quantity of CO2 (carbon dioxide) that may be emitted while still limiting warming to 1.5°C or 2°C.
• Carbon budgets are based on the assumption that growing global temperatures have a near-linear relationship with the quantity of accumulated atmospheric CO2.
• Carbon budgets are complex estimates that are typically subject to several uncertainties, such as the effect of non-CO2 greenhouse gases (GHG), the cooling effect of aerosols, and Earth-system feedbacks such as carbon released by thawing permafrost, which are not typically included in climate models.
• Carbon budgets aid in determining the effectiveness of GHG reduction efforts.
• These may include the use of renewable energy sources or the inclusion of mitigating measures such as carbon capture efforts or forestry programmes.

Global Carbon Budget, 2022 Report - Highlights

• In 2022, global carbon emissions are estimated to surpass 40.6 billion tonnes of CO2 in the atmosphere.
• This estimate is close to the all-time record yearly total of 40.9 billion tonnes of CO2 released in 2019.
• There is no hint of the essential reduction in carbon emissions to keep global warming to 1.5 degrees Celsius.
• If present emissions levels continue, there is a 50% chance that 1.5°C of warming will occur over the next 9 years.
• Droughts, wildfires, and flooding on a worldwide scale are being caused by the Earth's global surface temperature rising by roughly 1.1°C when compared to pre-industrial levels.
• China (31%), the United States (14%), and the European Union (8%), will be the largest contributors to global carbon emissions in 2021. India contributes to 7% of world carbon emissions.
• According to the analysis, carbon emissions in China (0.9%) and the EU (0.8%) will be lower in 2022. However, the US will see a 1.5% increase while India will see a 6% gain.
• When compared to the previous year, India is anticipated to have the biggest growth in carbon emissions in the world in 2022. The United States is expected to have the second-largest rise in carbon emissions.
• India's carbon emissions will rise by 5% in 2022 as a result of increased coal and oil emissions.
• This reduces carbon emissions to levels seen in 2019. Already, the country is responsible for around one-twelfth of global emissions.
• It is rated third in the world in terms of gross emission volume and relatively low in terms of per capita emissions.

Carbon Budget and Sixth IPCC Assessment Report

• According to the AR6, the world can release only roughly 500 gigatonnes of carbon dioxide (GtCO2) beginning January 1, 2020, with a 50% likelihood of keeping warming to 1.5°C.
• The budget will be 400 GtCO2 for a 67 percent likelihood of avoiding 1.5°C.
• The globe can release 1,350 GtCO2 for a 50% probability of keeping temperatures below 2°C, and 1,150 GtCO2 for a 67% likelihood.
• Carbon budgeting may also show the consequences of inactivity by utilising climate forecasts to create future scenarios.
• According to the IPCC (Intergovernmental Panel on Climate Change) Sixth Assessment Report Contribution of Working Group III, released in April 2022, there is still time to restrict global temperature rise to less than 1.5°C.
• However, the scientific community warns that the options for intervention are fast dwindling and that the situation is critical.

How carbon budgets can helps to reach Net-zero Emissions

• Carbon budgets evaluate how much CO2 is generated by industry, residences, and all other sectors of the economy in order to determine how much emissions must be reduced in the future.
• The goal is to achieve net-zero emissions, which means establishing an equal balance between carbon emitted into the atmosphere and carbon removed from it.
• Reducing emissions is critical to keeping increasing temperatures to 1.5C-2C over pre-industrial levels.
• Beyond that, experts predict that natural calamities such as frequent extreme weather occurrences, rising sea levels, and dwindling biodiversity would harm people and livelihoods.
• Furthermore, more than 70 nations, including China, the United States, and the European Union, which are responsible for the majority of carbon emissions, have promised to achieve net-zero emissions by 2050 or 2060. This accounts for 76% of global emissions.
• To help in the decarbonization of the world's most populated cities, the World Economic Forum developed the Net Zero Carbon Cities project.

Carbon Budgeting for the future

• Carbon budgets determine how much CO2 has been emitted, allowing governments to compute the amount of carbon that may still be released until net-zero objectives are attained.
• They attempt to balance a rise in emissions from one sector, such as agriculture, with comparable reductions in another.
• Carbon budgets aid in limiting global warming by linking the pace of emissions to the extra rise in temperature and can provide a step-by-step method to meeting climate objectives.
• They also aid in determining the success of GHG-reduction strategies, such as the use of renewable energy sources, and take into consideration mitigating variables such as carbon capture programmes or reforestation schemes.
• In this approach, they provide insight into how near a country is to attaining net zero.
• Some countries, like the United Kingdom and Japan, have established legally binding carbon budgets.

Carbon Budgeting and India

• An Indian emits just 1.97 tonnes of CO2 (tCO2) per year, but Americans and Canadians both release far more.
• In 2018, the richest 10% of Indians' per capita CO2 emissions were around 4.4 tonnes, compared to the richest 10% 's per capita emissions. Americans weighed 52.4 tonnes, over a tonne more than the wealthiest Indians.
• India's per capita emissions were a fraction of those of not only the EU (6.78 tCO2/person), but also of China (7.95 tCO2/person), making it the world's lowest per capita emitter among big economies.
• India argued during a closed-door discussion at the UN Climate Conference (COP27) that measures to decrease carbon emissions must be driven by science and the premise that the carbon budget is a global commons.
• Also the Finance Minister announced Rs 35,000 crore for priority capital investment by the Ministry of Petroleum and Natural Gas towards energy transition and net zero targets, as well as energy security.

Conclusion

Carbon budgets allow governments to track their progress towards fulfilling their climate targets. Achieving net-zero emissions would provide a sustainable future for the earth. However, due to the rapid accumulation of carbon, governments are having to revise their budgets more frequently than anticipated. Countries are attempting to reduce carbon emissions using the same budgeting approaches that people use to control their spending. Instead of balancing income and outgoings, environmental planners are balancing carbon dioxide (CO2) emissions, which cause global warming. This is referred to as a carbon budget.

FAQs

MCQs

Question: Which of the following statements is/are correct?

1. The carbon budget is the total amount of carbon dioxide (CO2) emissions allowed over time in order to stay below a certain temperature threshold.
2. The concept of a "Carbon Budget" arose gradually as a consequence of the UNEP's work.

Select the correct answer using the code given below.

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

Question: “Momentum for Change: Climate Neutral Now” is an initiative launched by (UPSC 2018)

(a) The Intergovernmental Panel on Climate Change

(b) The UNEP Secretariat

(c) The UNFCCC Secretariat

(d) The World Meteorological Organisation

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