The rapport between international trade and income inequality came to light after the Heckscher–Ohlin/Stolper–Samuelson theorem (HOS). Nevertheless, researchers have not concluded whether the HOS theory truly reflects reality. Even though the main focus provided by the HOS theory is on internal inequality (existing inside the country among its population), another way of analyzing the HOS theory is through income inequality among countries. This last possibility is also called income convergence. This work contributes to the topic of researching the relationship between the export of sugarcane-derived products and income to verify the income convergence effect. The cultivation of sugarcane is a relevant activity for many developing countries, including Brazil. In addition, no developed country is listed among the eight biggest sugarcane producers, which indicates that as a developing country product, it would be possible to analyze the relationship among the variables in a broader sense. The results obtained in the research indicate that the impact of the export of sugarcane products on income is minimal. Although positive, it is only perceived over time. Due to the characteristics of this research, which involves performing an analysis involving green production, green energy, and income inequality, this study is related to the seventh, eighth, and tenth United Nations’ SDG goals.

A crucial aspect analysed during the last years, aiming to improve sugarcane production, is the impact of climate change on sugarcane productivity. One of the strategies to mitigate climate change's impact on sugarcane yield is the development of new varieties known to positively affect crop production. This paper analysed how climate change impacts sugarcane production regarding the different planted varieties. Data regarding sugarcane harvest were collected from a cooperative in the south of Goiás state—Brazil, the second biggest national sugarcane producer. Results indicate that climate impact on sugarcane yield is irrelevant when controlling for different varieties. Considering the results presented in this work, the Brazilian government should keep the incentives for the development of new sugarcane varieties and, at the same time, spur sugarcane producers to use the new sugarcane varieties. The results imply that if the variety is correctly chosen, sugarcane can be produced without harming the environment, contributing to reaching SDG 15. Moreover, it is less probable that an adverse climatic event will destroy the planted area, preventing sugarcane producers from severe loss and contributing to achieving SDGs number 1 and 2.

The development of new sugarcane varieties affects crop production positively. However, only some studies have investigated how the use of different sugarcane varieties reacts to the impact of climate change, and how to improve sugarcane production efficiency considering the use of different sugarcane varieties in the field. This research hypothesizes that it is possible to mitigate climate change’s impact on sugarcane production and improve eco-efficiency if the proper sugarcane varieties are chosen. The main objective is to analyze the influence of different sugarcane varieties on production eco-efficiency. An econometric study unveiled the main elements affecting sugarcane production in this research. Afterward, a data envelopment analysis determined the sugarcane varieties with more efficient production. The results indicated that climate impact on production was irrelevant when controlling for different sugarcane varieties. Furthermore, it was found that through correct variety choosing, it is possible to improve harvest efficiency. The outcome of this research contributes to achieving the United Nations SDGs 1, 2, 7, 9, and 15.