Fig. 4: Heatmap illustrating the application frequency of the top 20 most frequent AI types across sustainability topic groups in word analysis.
From: Artificial intelligence in sustainable development research
Each cell’s intensity indicates the number of articles employing specific AI techniques within a sustainability topic. Some articles employed one or more types of AI algorithm (see Supplementary Table 1 for the top ten algorithms identified in the review). Not all 383 articles used in word analysis appear here as some empirical articles did not refer to any specific type of AI, but rather AI as a whole.
