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LANZHOU, May 2-- In addition to teaching economics at Lanzhou University, 55-year-old professor Yang Suchang spends most of his time studying cucumbers, tomatoes and other vegetables commonly grown by local farmers in a suburb greenhouse in northwest China's Gansu Province. As a professor of the School of Economics, Yang has rich hands-on experience and academic training in poverty relief, and the study on planting vegetables in a greener way is what Yang believes is an efficient way to help farmers shake off poverty in the less-developed province. Yang began his research on the experiences of the major agricultural provinces in China, such as Shandong Province. He found that a Shandong-based research center developed a green technology of using straw bioreactors to improve the growing environment of off-season vegetables. Yang then reached out to Zhang Shiming, director of the center, and was told that decomposed maize straws can produce carbon dioxide, heat, spores and other ingredients favorable to the planting of pollution-free and high-quality crops. In Gansu, a very large quantity of straws are produced each year, resulting in a real headache of environmental pollution and less-fertile land since the straws are usually burnt as waste. The idea of straw bioreactors offers a solution to the problem in Gansu, Yang said. He began to invite Zhang to give lessons among the farmers in Gansu to popularize the technology. | 
