Environmental Economics and Green Finance: Pathways Toward Sustainable Development

Abstract

Environmental degradation, climate change, biodiversity loss, water scarcity, pollution, and the depletion of natural resources have created serious challenges for conventional models of economic development. Environmental economics provides a theoretical and policy framework for understanding these problems by examining how economic decisions affect the natural environment and how environmental costs can be incorporated into markets, prices, taxation, investment, and public planning. Green finance complements this framework by mobilizing financial resources for renewable energy, energy efficiency, clean transportation, sustainable agriculture, climate-resilient infrastructure, biodiversity conservation, pollution control, and other environmentally beneficial activities. This article examines the relationship between environmental economics, green finance, and sustainable development. It explains how externalities, natural-capital depletion, information failures, and short-term investment incentives contribute to environmentally harmful economic behaviour. It also evaluates the role of carbon pricing, environmental taxation, green bonds, green loans, sustainability-linked finance, green sukuk, blended finance, carbon markets, and public green-investment institutions. The analysis argues that green finance can support economic growth, innovation, employment generation, energy security, and climate resilience when it is governed by credible taxonomies, transparent reporting, reliable environmental data, and effective regulatory institutions. Global investment in clean energy has increased significantly, reaching an estimated US$2.2 trillion in 2025, approximately twice the amount invested in oil, natural gas, and coal. Nevertheless, investment remains highly concentrated in advanced economies and China, while many developing countries continue to face high financing costs and limited access to climate capital. The article concludes that sustainable development requires the integration of environmental valuation, financial-sector reform, industrial policy, social protection, and institutional accountability. Green finance should not be treated as a substitute for environmental regulation; rather, it should operate as part of a broader policy framework that redirects public and private capital toward a low-carbon, climate-resilient, resource-efficient, and socially inclusive economy.