1. Energy efficiency, utilization of renewable energies, and carbon dioxide emission: case study of g20 countries
Mohammad Dodi Heryadi, Djoni Hartono

2. Economic growth, co2 emissions and energy use in the south caucasus and turkey: a pvar analyses
Cosimo Magazzino

3. Estimation of diffuse solar radiation in the region of northern sudan
Osman Wageiallah Mohammed, Guo Yanling

4. Experimental study and kinetic analysis of cuo y-al2o3 absorbed so2
Zhongqing Yang, Jianghao Xie, Li Zhang, Mingnv Guo, Jingyu Ran