Calories in Tazo Green Ginger Tea

Factual Questions
1

Is there any way to find out how many calories are in this tea? The ingredients are green teas, natural flavors, ginger root and lemon grass.

http://www.tazo.com/tazo.html

2

Not very many. This site says 2 calories.

http://www.calorie-count.com/calories/item/14381.html

This one says 1.

http://www.calorie-counter.net/tea-calories.htm

The sites are for general tea not specifically the one you are interested in. Do you need it more accurate than 1 or 2?

3

Basically, I was trying to find out how many calories the ginger root, lemon grass, and pear (natural flavors) add.