There is some debate about this and we'll leave that conclusion up to you. While there are most certainly trace levels of methylene chloride found in both green and roasted "MC" decaf, a recent study shows that the levels are far lower than the EPA limits. Ethyl acetate is often touted as being a "natural process" alternative. However, it's harmful to ingest ethyl acetate in large amounts regardless if it's naturally or synthetically derived. Though again, the trace amounts found in coffee are well below the allowable levels set by the EPA.