I like the focus on a real-life problem that is linked to climate change, this will make the player recognize the issues our planet faces, and likely want to research the topic of the Pantanal. Maybe less intentional, but I think using wildlife, or animals in general, for raising awareness and promoting taking action is very smart because people tend to feel more emotional around the topic of animals suffering, so the feeling of guilt and remorse will hopefully bring the player to make a change. An important note on games based on real and current events is to make sure lots of research is done, which you may already be doing, but I wanted to note.