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Ironing increases the humidity of a piece of cloth by injecting water vapor in the form of steam. But how does the vapor affect the fabric? Until now, it was thought that its only effect was to soften the fibers

Dear EarthTalk : I have a carpet made out of recycled PET bottles in my baby’s room and I started noticing a lot of the fibers on our clothes and even in my mouth! Is it dangerous for me or my baby to be in contact with and possibly ingest these fibers? -- Ashley Riccaboni, via e-mail