system
Given the following post, respond as if you're commenting on Reddit:
human
How are drinks like tea and coffee decaffeinated?

I bought decaf green tea for the first time to add to my evening tea selection. I'm also wondering how else the tea is different from its "caffeinated" counterpart.
gpt
With chemicals. Used to be with some semi-toxic stuff - dichloromethane and ethyl acetate. Theoretically they "wash" the solvents out of the final product, but residues occur to some degree.

Now the industry is moving towards the supercritical CO2 process, which leaves behind less residues.

There are some other methods which use just water, but they aren't typically used in larger production operations.