South Africa's Carbon Challenge: Insights from UKZN's Comprehensive 30-Year Study

A groundbreaking analysis conducted by researchers at the University of KwaZulu-Natal (UKZN) has shed new light on the intricate relationship between carbon dioxide (CO₂) emissions and economic growth in South Africa. Spanning three decades from 1990 to 2020, the study meticulously examines how factors such as fossil fuel consumption, renewable energy use, technological innovation, and globalization influence the nation's environmental footprint. Led by Frank Ranganai Matenda from UKZN's School of Accounting, Economics and Finance, alongside colleagues Helper Zhou and Mabutho Sibanda, and Asif Raihan from Malaysia's National University, this research employs advanced econometric techniques to deliver actionable insights for policymakers.

South Africa, Africa's largest emitter of greenhouse gases, faces a unique conundrum. Despite commitments to net-zero emissions by 2050 under its Nationally Determined Contribution (NDC), the country's heavy reliance on coal-powered electricity—accounting for over 80% of its energy mix—continues to propel CO₂ levels upward. The UKZN study, published in Carbon Research, uses the Dynamic Ordinary Least Squares (DOLS) estimator, corroborated by Fully Modified Least Squares (FMOLS) and Canonical Cointegrating Regression (CCR) methods, to quantify these dynamics. This rigorous approach accounts for long-run relationships amid variables integrated at different orders, ensuring robust conclusions.

Historical Trends in South African CO₂ Emissions

Over the study period, South Africa's annual CO₂ emissions from fossil fuels rose from approximately 300 million tonnes (Mt) in 1990 to a peak of around 460 Mt by 2019, before a slight dip to about 425 Mt in recent years due to economic slowdowns and initial renewable integrations. Per capita emissions hover at 7-8 tonnes, significantly above the global average. This trajectory mirrors robust gross domestic product (GDP) growth, particularly post-1994 democratization, when industrialization and urbanization accelerated energy demand.

Key drivers include Eskom's coal-fired power stations, which supply 90% of electricity. Data from Our World in Data illustrates how emissions correlated with GDP expansion, peaking during commodity booms in the 2000s. However, post-COVID recovery and load-shedding crises have tempered growth, with GDP per capita stagnating below $7,000 USD. The study highlights that without intervention, this fossil-fuel dependency risks derailing climate goals.

Fossil Fuels: The Primary Culprit

The research unequivocally identifies fossil fuel consumption—primarily coal and oil—as the dominant force behind emissions surges. A 1% increase in fossil energy use correlates with a 1.53% rise in CO₂ emissions in the long run. This elasticity underscores South Africa's energy profile: coal constitutes 60% of primary energy supply, fueling mining, manufacturing, and heavy industry.

Step-by-step, fossil fuels enter the emissions chain through combustion in power plants, vehicles, and factories, releasing CO₂ that traps heat in the atmosphere. Regional context amplifies this: Mpumalanga's coal belt powers the nation but burdens local communities with acid rain and respiratory illnesses. Concrete examples include Eskom's Medupi and Kusile plants, each emitting over 30 Mt CO₂ annually, exemplifying how energy security clashes with environmental imperatives.

Economic Growth's Double-Edged Sword

While economic expansion has lifted millions from poverty, it exacts an environmental toll. The study finds a 1% GDP growth linked to 0.08% higher emissions, reflecting South Africa's resource-intensive growth model. From 1990 to 2020, GDP tripled in real terms, but emissions grew 50%, defying the Environmental Kuznets Curve hypothesis where pollution falls after a growth threshold.

Stakeholder perspectives vary: industry groups like Business Unity South Africa argue growth funds green transitions, while environmental NGOs like groundWork decry 'dirty development.' Implications are stark—unmitigated growth could push emissions beyond NDC limits of 350-420 MtCO₂e by 2030.

The Paradox of Technological Innovation

Counterintuitively, technological innovation—proxied by patent applications—exacerbates emissions by 0.09% per 1% increase. In South Africa, innovations often optimize fossil extraction and combustion rather than supplant them. For instance, advanced mining tech boosts coal output efficiency but scales emissions.

This finding challenges assumptions that patents inherently green economies. Instead, it calls for 'green patents' incentives, redirecting R&D toward carbon capture and storage (CCS) or efficient renewables. UKZN researchers note that without policy nudges, innovation reinforces the status quo.

Photo by Joshua Kettle on Unsplash

Globalization's Hidden Emissions Cost

Globalization, measured by trade openness, adds 0.31% to emissions per 1% rise, as imports of carbon-intensive goods and export-driven manufacturing embed emissions abroad and at home. South Africa's export of platinum and iron ore ties growth to global demand, but supply chains amplify footprints.

Perspectives from the World Bank highlight how foreign direct investment (FDI) in polluting sectors outpaces green inflows. Future outlook: decoupling via trade agreements prioritizing sustainability.

Renewable Energy: The Promising Mitigator

Amid challenges, renewables shine: a 1% consumption increase reduces emissions by 0.20%. South Africa's solar and wind potential is world-class, with irradiation levels topping global averages. By 2026, renewable capacity nears 12 GW, up from 6 GW in 2020, thanks to REIPPPP Bid Window 6 and private rooftop solar boom.

• Wind: 3.4 GW operational, farms like Jeffreys Bay exemplify scalable clean power.
• Solar PV: 5 GW+, with 1.6 GW added in 2025 alone.
• Hydro and CSP: Supporting baseload.

Progress includes ending licensing for projects under 100 MW, spurring distributed generation.

South Africa's Just Energy Transition Partnership

The JETP, with $13.8 billion pledged (despite US pullout), funds decommissioning 8 GW coal by 2035, grid expansion, and skills retraining. 2026 updates show $2 billion disbursed, focusing transmission lines for renewables. Challenges persist: grid bottlenecks delay 10 GW queued projects.

JET IP 2023-2027 outlines $98 billion needs, emphasizing justice for coal communities via reskilling in green hydrogen and EVs.

Policy Recommendations and Actionable Insights

UKZN experts urge:

• Carbon taxes expansion beyond current R159/tCO₂.
• Subsidies for green innovation and renewables.
• Energy efficiency standards in industry.
• International cooperation for tech transfer.

Real-world cases: Kenya's geothermal success offers lessons; SA's GreenCape facilitates private investments exceeding R200 billion.

UKZN's Pivotal Role in Climate Research

UKZN exemplifies South African higher education's climate leadership, with disciplines from economics to engineering driving evidence-based solutions. The study's open-access publication fosters global dialogue, positioning UKZN researchers as influencers in decarbonization discourse.

Future outlook: Aligning IRP 2025's 40% clean energy by 2030 with NDC requires accelerated renewables, potentially cutting emissions 20% by 2030.

Photo by Sibusiso Mbatha on Unsplash

Challenges, Opportunities, and Path Forward

Barriers include Eskom debt (R400 billion+), skills gaps (needing 300,000 green jobs), and political inertia. Yet opportunities abound: renewables could save R100 billion in fuel imports annually, boost GDP 1.5%, and create employment in solar assembly.

Stakeholders—from government to academia—must collaborate. UKZN's work underscores higher education's role in bridging growth and sustainability.

For deeper dive, access the full study or news release.