I am not sure but these are an alternative form of writing so that you are able to pronounce the word.
I think the letters are for pronouncing "Anyone"
If the question is why should we care about climate change the answers is:
Because we all need clean water
Even a small increase in global temperatures will destabilise the water cycle and could make water scarcity much worse. Climate change affects rainfall patterns, meaning both drought and flooding will be more common, and more intense.