Green tea has antioxidant activity and anti-inflammatory activity–and anti-tumor activity. So, drinking green tea can help protect you against a lot of the environmental damage that’s occurring from a number of different sources.
Green tea has less mold in its production than black tea, so it seems to be more beneficial in that way, and various compounds isolated from green tea have been tested for decades and shown to have anti-cancer activity in the test tube. Those products include something called EGCG, and a number of other related compounds. So I recommend that green tea become a regular part of your diet if you’re not sensitive to the small amount of caffeine in it.