Many dis eases are caused by a combination of several factors — eco nomic, social and lifestyle (nutrition, smoking, etc.) — making it difficult to isolate the specific environmental elements. ments.
Numerosas enfermedades se deben a una combinación de factores —factores económicos, sociales, modo de vida (alimentación, tabaquismo, etc.)—, de ahí la dificultad de detectar las causas exclusivamente ambientales.