how much caffeine does green tea have?

Coffee has more caffeine than tea does.

coffee bu tea has plenty of caffeine too

Green tea contains less caffeine than coffee: there are approximately thirty to sixty mg. of caffeine in six - eight ounces of tea, compared to over one-hundred mg. in eight ounces of coffee.

Green tea has significantly less than black tea or coffee....but then again, the caffeine content of all three depends on how strongly they're brewed in the first place.....

Christopher