CLIMATE CHANGE: ECONOMIC IMPACT AND SOLUTIONS: DISCUSS POLICIES LIKE CARBON PRICING Ziyadullayeva Mohira Tagayevna Kamalova Fazilat Komiljonovna Ziyokulova Sabrina Abdumajidovna

Аннотация

This paper explores the economic impacts of climate change and the role of carbon pricing as a key policy instrument for mitigation. Drawing upon the theoretical contributions of Nicholas Stern, William Nordhaus, Joseph Stiglitz, and Jeffrey Sachs, the study examines how economic frameworks interpret and address the intersection between environmental degradation and economic growth. Stern’s and Sachs’s analyses emphasize moral responsibility and global inequality, while Nordhaus and Stiglitz focus on cost efficiency and market-based solutions. Key words: Stern Nordhaus, William Nordhaus, Dice model, carbon pricing, global GDP, the long-term economic, critical evaluation. ИЗМЕНЕНИЕ КЛИМАТА: ЭКОНОМИЧЕСКИЕ ПОСЛЕДСТВИЯ И РЕШЕНИЯ: ОБСУЖДЕНИЕ ТАКИХ МЕР ПОЛИТИКИ, КАК ЦЕНООБРАЗОВАНИЕ В ОТНОШЕНИИ ВЫБРОСОВ УГЛЕРОДА. Аннотация. В данной статье рассматриваются экономические последствия изменения климата и роль ценообразования в отношении выбросов углерода как ключевого инструмента политики по смягчению последствий. Опираясь на теоретические труды Николаса Стерна, Уильяма Нордхауса, Джозефа Стиглица и Джеффри Сакса, исследование рассматривает, как экономические модели интерпретируют и учитывают взаимосвязь между ухудшением состояния окружающей среды и экономическим ростом. В своих исследованиях Стерн и Сакс делают акцент на моральной ответственности и глобальном неравенстве, в то время как Нордхаус и Стиглиц фокусируются на экономической эффективности и рыночных решениях. Ключевые слова: Стерн Нордхаус, Уильям Нордхаус, модель Дайса, ценообразование в отношении выбросов углерода, мировой ВВП, долгосрочная экономическая перспектива, критическая оценка. Theories review The economic consequences of climate change have been extensively discussed by leading economists and environmental scholars. Nicholas Stern (2006), in his influential Stern Review on the Economics of Climate Change, argued that the long-term economic damage caused by inaction would far exceed the short-term costs of mitigation. Stern emphasized that without substantial policy intervention, global GDP could shrink by up to 20%, primarily due to reduced agricultural productivity, extreme weather events, and rising sea levels. His analysis positioned climate change as the greatest market failure in human history, requiring immediate economic and political responses. Similarly, William Nordhaus, Nobel Prize-winning economist, developed the DICE model (Dynamic Integrated Climate-Economy) to assess the economic effects of carbon 1 05 International scientific journal ISSN: 2181-3906 «MODERN SCIENCE АND RESEARCH» 2025 VOLUME 4 / ISSUE 11 / UIF:8.2 / MODERNSCIENCE.UZ emissions on global output. Nordhaus (2018) concluded that implementing a globally harmonized carbon price is one of the most efficient ways to internalize environmental externalities. He demonstrated that carbon pricing aligns private incentives with social welfare by making polluters pay for the true cost of their emissions. In addition, Joseph Stiglitz and Nicholas Stern (2017) jointly published a report through the High-Level Commission on Carbon Prices, recommending that the optimal carbon price should range between $40 and $80 per ton of CO₂ by 2020 to achieve the Paris Agreement targets. Their research reinforced the idea that well-designed carbon pricing policies not only reduce emissions but can also stimulate innovation and green investment. From a broader macroeconomic perspective, Jeffrey Sachs highlighted that climate change intensifies inequality between nations, as poorer economies are more exposed to environmental shocks and lack adaptation capacity. Sachs (2019) argued that economic resilience requires both domestic policy reforms and international cooperation through financial transfers and technology sharing. Collectively, these scholars emphasize that addressing climate change through economic mechanisms—particularly carbon pricing—can serve as both a preventive and corrective tool. However, their differing assumptions regarding optimal pricing levels, social discount rates, and global coordination highlight the complexity of designing a universally effective climate policy. Analysis and discussion of theories While the arguments presented by Stern, Nordhaus, Stiglitz, and Sachs provide a solid foundation for understanding the economic dimensions of climate change, each theoretical perspective exhibits distinct strengths and weaknesses that shape contemporary climate policy debates. The Stern Review has been widely praised for successfully reframing climate change as an economic rather than purely environmental problem. Its strength lies in emphasizing the long- term economic risks of inaction, thereby legitimizing public investment in mitigation strategies. However, several scholars, such as William Nordhaus (2007), have criticized Stern’s use of a low discount rate, which, they argue, overstates the present value of future damages and leads to excessive policy costs in the short t