AC stands for air-conditioning. I'm pretty all of us have used an AC at least once in our lives. It makes the room feel cold which brings some relief,especially in the summers! But it's not the whole part of the story...
AC's can have many negative impacts on us like giving us dry eyes, itchy skin and making us feel dehydrated. These are only the health concerns and I haven't even started in the environmental impacts! Using ACs releases carbon dioxide into the atmosphere which as we know is a greenhouse gas that traps heat.
If you still consider using or buying an AC-don't forget the high electricity bills! There is so much information in the internet, I recommend you spend a few minutes if your day researching more if this intriguied you!