While is a main greenhouse gas, no new is generated with this technology, so it does not contribute to global warming. Liquid companies recapture the that's already a by-product of several manufacturing processes, and they then recycle it into the liquid solvent for cleaning clothes. The main drawback is that, while the itself is both cheap and abundant, the cost of a dry cleaning machine is very high. Few dry cleaners are adopting this technique for this reason.

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