The study looked at changes in land use around Lake Baikal from 2005 to 2015, focusing on Irkutsk city. They used satellite images to see how the land was changing and found that more construction land was being built, forests were being converted, and grasslands were decreasing. The main reasons for these changes were urban growth, population movement, and economic shifts. The study suggests that human activities like urbanization and economic development are impacting the environment, leading to a decrease in natural areas like forests and grasslands.