Although it is said that marijuana is not good for the body, it is still harmful to the lungs and by smoking it you could potentially put yourself or others in danger. Marijuana dulls the senses almost like alcohol.
The therapy is called Radiation Therapy. Its a treatment that kills abnormal cells or cancel cells by using radioactive ray such as gamma rays use it in killing the cancer cells in the body without harming any good cells that support the immune system of the body. This therapy also use any king of radioactive material in the treatment by placing it in the area that is near the cancer cells or a tumor.
I think the smallest but impactful act is to just support local farmer's markets.
A. A gradual but complete withdrawal from drugs