While I'm at it, though, I'll mention a few facts I found on the Environmental Protection Agency's web site about dry cleaners:
Dry cleaners are the single largest users of Perchloroethylene (PCE or perc). Perc is an organic solvent of known human toxicity and is a precursor to ground level ozone (smog). Exposure to perchloroethylene can occur in the workplace or in the environment following releases to air, water, land, or groundwater. PERC enters the body when breathed in with contaminated air or when consumed with contaminated food or water. PERC is less likely to be absorbed through skin contact. Once in the body PERC can remain, stored in fat tissue.
Perchloroethylene evaporates when exposed to air. It dissolves only slightly when mixed with water. Most direct releases of PERC to the environment are to air. It also evaporates from water and soil exposed to air. Once in air, PERC breaks down to other chemicals over several weeks. Because it is a liquid that does not bind well to soil, PERC that makes its way into the ground can move through the ground and enter groundwater. Plants and animals living in environments contaminated with PERC can store small amounts of the chemical. Although most dry cleaners use less than 140 gallons of perc a year, there are an estimated 25,000 to 35,000 dry cleaning facilities nationwide. Therefore, the cumulative environmental impact from these numerous facilities is significant.
Anyway, I'm not sure I can stop the world (or even my husband) from using dry cleaners, but at least I can bring my old wire hangers to a place where they'll be reused rather than ending up in some landfill somewhere...