Figure 5
A line graph titled Sources' Production over Time. The horizontal axis represents the year, ranging from 2016 to 2024. The vertical axis represents the cumulative occurrences, ranging from 0 to 400. The graph includes multiple lines, each representing a different source. The sources are color-coded and labeled as follows: Environmental Science and Pollution Research in red, International Journal of Environmental Research and Public Health in orange, Journal of Cleaner Production in green, Science of the Total Environment in blue, and Technological Forecasting and Social Change in pink. The blue line representing Science of the Total Environment shows a steep upward trend starting around 2019, reaching over 400 cumulative occurrences by 2024. The green line representing Journal of Cleaner Production also shows an upward trend, reaching around 150 cumulative occurrences by 2024. Research production over time