Yale Environment Review

Yale Environment Review (YER) is a student-run review that provides weekly updates on environmental research findings.

Can the Chinese economy take on a renewable energy revolution?

Original Paper:
Dai, H., Xie, X., Xie, Y., Liu, J., Masui, T., "Green growth: The economic impacts of large-scale renewable energy development in China." Applied Energy. Volume 162, 15 January 2016, 435-449, ISSN 0306-2619. DOI: http://dx.doi.org/10.1016/j.apenergy.2015.10.049

Tuesday, November 15, 2016

A new study takes a closer look at how large-scale renewable energy development may impact China's macro-economy.

The 1.4 billion Chinese have to confront a brutal reality: their astronomical energy demand will not be satisfied by the nation's fossil fuel resources. The loss of natural habitat and the growing concern about climate change impacts add further uncertainties to the country's energy future. Since 2009, China has responded to its growing energy and environmental challenges by reducing carbon emissions and expanding the use of alternative energy sources. Most recently, China pledged that its non-fossil fuel energy will account for 20 percent of the country's primary energy sources by 2030. However, a drastic growth in renewable energy development may cloud China's economic future. Many studies have tried to connect the dots between renewable energy consumption and economic growth. Yet, the connection is unclear.
In a new paper, Hancheng Dai from the Japan-based National Institute for Environmental Studies and his team developed a model to estimate the impacts of renewable energy development on China's overall economy. Based on the model, called Computable General Equilibrium (CGE), Dai set up two scenarios. The baseline scenario assumes that renewable energy development will grow at a conventional pace, whereas the other scenario assumes a drastic growth in renewable energy. The result is clear: a significant growth in renewable energy will not incur substantial costs on the Chinese economy. Dai's research is published in Applied Energy.
Dai applies the CGE model to study the link between renewable energy and China's macro-economy. To estimate the economic cost of renewable energy development, he improved the model by differentiating the impact of different renewable energy technologies within the power sector. Also, Dai drew a distinction between investment in conventional and non-fossil fuel energy. Such a distinction enables the model to craft the two energy investment strategies as he developed his scenarios.
The baseline scenario reflects a moderate pace of renewable energy growth, forecasted by top Chinese research institutes. The second scenario assumes a dramatic growth in solar, wind, and biomass and a substantial decrease in coal and oil. This progressive scenario will have three consequences in 2050. First, non-fossil power sector will experience tremendous growth, reaching a total value added of US$1.18 trillion (equivalent to 3.4 percent of the GDP). Second, industries that construct renewable technologies such as wind turbines and solar panels will also experience substantial growth and job creation. The renewable energy sector will generate value added of US$302 billion and create 4.12 million jobs in the upstream industries. Third, fossil fuel industries and energy intensive sectors such as mining and constructions will be negatively impacted. In particular, the coal mining industry will see its output fall by 52 percent, along with a loss of one million jobs.
Fortunately, the negative impact in the drastic renewable energy growth scenario will be largely counteracted by the increase in demand for goods that are less energy-intensive. Moreover, such a large-scale development can remarkably stop carbon emissions from growing by 2025, fulfilling a recent pledge by Chinese President Xi Jinping to curb emissions. In the end, large-scale renewable energy growth will only lead to an estimated 0.3 to 1.5 percent drop in GDP and household consumption. It will position the non-fossil power sector to be a mainstay industry, equivalent to 3.4 percent of the GDP, surpassing industries such as agriculture, iron, and steel.
Dai and his colleagues also proposed a three-tier roadmap to achieving China's ambitious goal of renewable energy development. From now until 2020, renewable energy sector will mature and enter into an era of rapid growth in the 2020s. The decade between 2020 and 2030 will be marked by rapid penetration for renewable energy due to cost reduction.From 2030 to 2050, renewable energy will replace fossil fuel as the dominant energy source.
Despite the improvements made, this study contains a few limitations. It only considers renewable energy in the context of power sector as a substitute for coal. The huge potential for renewable energy to substitute petroleum in the transportation sector has not been considered. Also, the model plays down the impact of international trade. Foreign supply and Chinese export of renewable energy may significantly change the result of the model. Lastly, the highly weather-dependent nature of solar and wind energy is not accounted for by the model. More studies are needed to address the aforementioned limitations.