Study on the environmental effects of China's two-way FDI 并列题名：Study on the environmental effects of China's two-way FDI Study on the environmental effects of free trade 并列题名：Study on the environmental effects of free trade Study on the environmental history of Jiangnan The environmental effects of trade 书名原文:The environmental effects of trade Study on the environmental externalities of foreign direct investment Environmental effects of China's foreign trade A study on the environmental history in the area of Jianghan lakes