The Global Significance of Renewable Energy: Contributions to Economic Growth and Environmental Sustainability

Abstract

Renewable energy has moved from the margins of the global energy system to its leading edge, reshaping how electricity is generated, traded, and valued. This review synthesises recent evidence on the economic and environmental significance of renewable energy at a global scale. On the economic side, it examines investment trends, employment generation, the levelised cost of electricity (LCOE), energy security, and energy access, drawing on the latest data published by the International Renewable Energy Agency (IRENA), the International Energy Agency (IEA), and the International Labour Organization (ILO). On the environmental side, it reviews the contribution of renewables to greenhouse gas (GHG) mitigation, air quality, and the associated trade-offs in land, water, and material use. The review further discusses the policy architecture supporting the global energy transition, including the Paris Agreement and the COP28 tripling pledge, and identifies the principal barriers that continue to constrain deployment: grid integration and intermittency, storage costs, financing gaps in developing economies, and critical-mineral supply chains. The evidence indicates that renewable energy is no longer solely a climate mitigation tool but has become a central pillar of economic competitiveness, energy security, and industrial policy, while significant regional disparities in investment and employment remain a persistent challenge to an equitable global transition.

Introduction

Renewable energy has become essential for achieving sustainable economic growth while reducing the environmental damage caused by fossil fuels. Sources such as solar, wind, hydropower, bioenergy, geothermal, and marine energy are increasingly replacing conventional energy sources. This review examines the global growth of renewable energy and its economic benefits, environmental contributions, supporting policies, and remaining challenges.

1. Global Renewable Energy Growth

Global renewable electricity capacity reached approximately 4,443 GW by the end of 2024, following record net additions of around 582 GW during the year. Solar photovoltaic (PV) and wind power account for most new capacity installations, with China leading global expansion. Renewable energy, together with nuclear power, supplied a substantial share of the increase in global electricity demand in 2024. Renewables are expected to become the largest source of global electricity generation as deployment continues to grow.

2. Economic Contributions

Renewable energy contributes to economic development in several ways:

• Investment: Global clean energy investment is estimated at USD 2.2 trillion in 2025, approximately twice the investment in fossil fuels.

• Employment: The renewable energy sector supported around 16.6 million jobs worldwide in 2024, with solar PV representing the largest employment segment.

• Cost competitiveness: The cost of renewable electricity has fallen substantially. In 2024, the global weighted-average levelized cost of electricity was approximately USD 0.043/kWh for utility-scale solar PV and USD 0.034/kWh for onshore wind.

• Energy security: Domestic renewable resources can reduce dependence on imported fossil fuels and exposure to fuel-price fluctuations.

• Energy access: Renewable technologies can expand electricity access, particularly in remote and underserved communities.

However, investment and employment remain unevenly distributed. China dominates the industry, while Africa receives a disproportionately small share of global clean energy investment despite its substantial renewable energy potential.

3. Environmental Contributions

Renewable energy helps reduce greenhouse gas emissions by replacing fossil-fuel-based electricity generation. It also improves air quality by reducing emissions of pollutants associated with coal, oil, and natural gas combustion. These benefits support climate change mitigation, public health, and environmental sustainability.

Nevertheless, renewable energy technologies also create environmental challenges. Solar panels, wind turbines, batteries, and other equipment require raw materials, land, and manufacturing resources. Waste management, mineral extraction, biodiversity impacts, and recycling must therefore be addressed to ensure that the energy transition remains sustainable throughout the technology lifecycle.

4. Government Policies and Remaining Challenges

Government policies, financial incentives, technological innovation, and international climate commitments have supported renewable energy growth. Despite this progress, several barriers remain, including high upfront investment requirements, inadequate electricity grids and storage, regulatory uncertainty, supply-chain constraints, and unequal access to finance and technology.

Addressing these challenges requires stronger policy frameworks, investment in grid infrastructure and energy storage, international cooperation, workforce development, and improved access to affordable financing.

Conclusion

This review has synthesised recent global evidence on the economic and environmental contributions of renewable energy. Economically, renewables have become the least-cost source of new electricity generation in most markets, attract roughly twice the investment directed to fossil fuels, and directly employ more than sixteen million people worldwide, while also strengthening energy security through reduced fossil fuel import dependence. Environmentally, the accelerating deployment of solar, wind, and other renewable technologies is measurably slowing the growth of global greenhouse gas emissions and delivering substantial air-quality co-benefits, even as land-, water-, and mineral-related trade-offs require careful management. The central challenge for the remainder of this decade is not primarily technological but structural: translating the sector’s remarkable cost and capacity gains into a more geographically balanced transition, supported by adequate grid and storage infrastructure and by stable policy frameworks, so that the economic and environmental benefits documented in this review can be realised at global scale.

References

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Copyright

Copyright © 2026 Jyoti Prakash Myageri , Math Abhishek Gurulingayya. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.