EM1 is a specially formulated culture of microbes (primarily lactic acid bacteria, purple non-sulfur bacteria, and yeasts) that work together to digest a myriad of offensive compounds and pathogens and create environments more suitable for healthy growth, which is to say they're a super group of hardy microbes that can make yucky situations better! EM1 can be used to stimulate plant growth and create healthier soil, but it can also be used to eliminate household odors, sanitize surfaces, and even keep plumbing clean and clear.