By Doyle Rice USA TODAYNow this is getting serious.Many of the world's prime wine-growing regions could shrink dramatically due to human-caused climate change, a study released Monday suggests.This is because wine grapes are extremely sensitive to the changes in temperature and season that come with climate change.In fact, if the global temperature rises by 3.6 degrees Fahrenheit by 2100, the regions of the world that are suitable for growing wine grapes could shrink by as much as 56% , according to the study.