I wish someone calculated with some certainty how much the lifestyles in different countries would have to change if the world just had to drop production that

I wish someone calculated with some certainty how much the lifestyles in different countries would have to change if the world just had to drop production that emits excess gases. I bet that would show that there's no way people modify their habits for this, especially in the ‘first world’. (As for myself, I'm living on less that 400 bucks a month, including rent, use transport once a month; and most energy I use is probably for central heating in the winter and for pumping water—otherwise it's the fridge and boiling water for tea. But idk about the ‘footprint’, probably still not good.)