Successful prime-time television of any genre produces some kind of emotional reaction in the viewers. There are a lot of different emotions to tap into. The emotion of the reward of discovery, the feeling of righteous anger, the feelings of pathos and sadness, or sentimentality of being moved by something.
Being told about the effects of climate change is an appeal to our reason and to our desire to bring about change. But to see that Africans are the hardest hit by climate change, even though they generate almost no greenhouse gas, is a glaring injustice, which also triggers anger and outrage over those who seek to ignore it.