Take care with manufactured chemicals, certainly. Your safety and long term health are more important than anything. Yet don't forget that if you grow even a dozen different plants, you are surrounded by chemistry. Inside their cells even the most ordinary plants creates potent fungicides, insecticides, irritants, balms, hallucinogens, sedatives, nerve toxins, cell repair stimulants, lures, repellents... you name it. Treat all plants with respect!