^pof;
Geology,;
China;
Earthquake;
Administration,;
Beijing;
100029,;
China;
^pof;
Geography,;
Beijing;
Normal;
University,;
Beijing;
100875,;
China;
^pof;
Environment;
Science;
and;
Technology,;
Tianjin;
University,;
Tianjin;
300072,;
China;
二氧化碳排放量; 发展中国家; 国际贸易; 实证分析; 贸易出口; 通信电子设备; 对外贸易; 化工行业;