If they've truly changed, their reward is from the universe in the form of a more peaceful and fair existence. You are not the reward fairy. You are not a vending machine where they put in an apology and get a bag of no-consequences.
Madness string 98159
Studies generally tend to follow up each other with 'oh it's worse' in climate stuff. Even when stuff looks better or like it's adapting, it tends to be a temporary fix. We're systemically eliminating all the support mechanisms and redundancies in nature for dealing with climate change.