Pujate, Agnese, Edīte Pujāte, and Sergejs Kodors. 2016. “CO2 EMISSIONS AND CLIMATE CHANGE IN THE WORLD 1970-2013”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 20 (April): 313-18. https://doi.org/10.17770/het2016.20.3516.