It has been found that some widely used cleaning products have serious adverse effects on the health of building occupants and janitors. The average person spends about 90% of their day indoors, where air pollution from diverse sources such as cleaners, upholstery, and carpeting can be up to 100 times greater than outdoor air. Short term health problems caused by exposure to hazardous cleaning products range from eye irritation and coughing to chest pain, vomiting, cramps, and diarrhea. Long-term effects may include liver and kidney failure, birth defects, emphysema, brain damage, and even cancer. 11.6% of work-related asthma comes from cleaning products. In addition, people who suffer from multiple chemical sensitivity syndrome, a disease that is not fully understood or recognized by the medical community, feel that low level exposure to chemicals, such as cleaning products, cause them to feel sick. Not only are humans affected but the affects of these cleaning chemicals are felt down stream, literally. Some ingredients of cleaning products are associated with eutrophication (toxics.usgs.gov/definitions/eutrophication.html) of streams and are toxic to aquatic organisms. 
 reference: Nick Celentano and Mike Kyc  University of Connecticut Green Cleaning Agenda