Alternatives made from common metals like aluminium are available.
Dry cleaning isn't really dry – it uses chemical solvents. Perc, the most common option, has contaminated soil and groundwater and poses serious health risks, but safer choices are emerging.
Regulations are catching up with toxic chemicals we're exposed to as products' end users. But workers in un- or underregulated places are still at risk, even from chemicals designed to be "green."