How much does a tea bag weigh?
A dry tea bag weighs just a few grams; much less than an ounce. When wet, however, it might weigh an ounce or so.
The tea bag itself can be made of a number of things, not all of them paper, and the difficulty in cleaning all of the tea out of the bag would make the whole process much too complicated. However, tea bags go wonderfully into compost as they are organic matter and will decompose and return to the earth. Many people also use a teabag more than once to make tea, and call this recycling.