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Bungwe la US Environmental Protection Agency lapereka lingaliro loletsa kugwiritsa ntchito methylene chloride m'mafakitale ndi mabizinesi onse. Lingaliro latsopanoli labwera pambuyo poti bungweli lamaliza kuwunika zoopsa mu Novembala 2022 komwe kunapeza kuti kukhudzana ndi zinthu zosungunulira kungayambitse mavuto pa thanzi monga matenda a chiwindi ndi khansa.
Methylene chloride imapezeka mu zinthu zosiyanasiyana, kuphatikizapo zomatira, zochotsera utoto, ndi zotsukira mafuta. Imagwiritsidwanso ntchito kwambiri ngati zinthu zopangira mankhwala ena. Bungwe la US Environmental Protection Agency likuyerekeza kuti antchito oposa 900,000 ndi ogula 15 miliyoni nthawi zonse amakumana ndi methylene chloride.
Kapangidwe kake ndi kachiwiri kuunikiridwa motsatira lamulo lokonzanso la Toxic Substances Control Act (TSCA), lomwe limafuna kuti Environmental Protection Agency iwunikenso chitetezo cha mankhwala atsopano ndi omwe alipo kale m'makampani. Cholinga cha bungweli ndikuletsa kupanga, kukonza, ndi kufalitsa methylene chloride mkati mwa miyezi 15.
Kugwiritsa ntchito methylene chloride kwina sikuletsedwa kuletsa kumeneku, kuphatikizapo kugwiritsa ntchito ngati mankhwala. Mwachitsanzo, ipitiliza kugwiritsidwa ntchito popanga hydrofluorocarbon-32 refrigerant, yomwe idapangidwa ngati njira ina m'malo mwa njira zina zomwe zitha kutentha kwambiri padziko lonse lapansi komanso/kapena kuchepa kwa ozone.
"Tikukhulupirira kuti methylene chloride ikadali yotetezeka kugwiritsidwa ntchito ndi asilikali ndi boma," Michal Friedhoff, woyang'anira wa Environmental Protection Agency's (EPA) Office of Chemical Safety and Pollution Prevention, adatero pamsonkhano wa atolankhani asanalengeze. "EPA ifunika kuchitapo kanthu kuti iteteze chitetezo cha ogwira ntchito."
Magulu ena oteteza zachilengedwe adalandira lingaliro latsopanoli. Komabe, adawonetsanso nkhawa ndi zomwe sizingachitike pa lamuloli zomwe zingalole kuti methylene chloride ipitirire kugwiritsidwa ntchito kwa zaka khumi zikubwerazi.
Maria Doa, mkulu wa mfundo za mankhwala ku Environmental Defense Fund, anati kugwiritsa ntchito mankhwala kwa nthawi yayitali kumeneku kudzapitirizabe kubweretsa zoopsa kwa anthu okhala pafupi ndi malo osagwiritsidwa ntchito. Doa adati bungwe loteteza zachilengedwe liyenera kufupikitsa nthawi yochotsera mankhwala kapena kukhazikitsa malamulo ena okhudza kutulutsa methylene chloride kuchokera ku zomerazi.
Pakadali pano, bungwe la American Chemistry Council, lomwe limayimira opanga mankhwala, linati malamulo omwe akuperekedwawa angakhudze unyolo woperekera mankhwala. Gululo linanena m'mawu ake kuti kuchepetsa mwachangu kupanga methylene chloride kungapangitse kuti kuchepe ndi theka. Gululo linati kuchepetsa kumeneku kungakhale ndi "zotsatira zoyipa" pamakampani ena monga mankhwala, makamaka ngati "opanga asankha kuyimitsa kupanga konse."
Methylene chloride ndi mankhwala achiwiri mwa mankhwala 10 omwe Environmental Protection Agency ikukonzekera kuwunika kuti ione zoopsa zomwe zingachitike pa thanzi la anthu komanso chilengedwe. Choyamba, ndi asbestos. Freedhoff adati malamulo a chinthu chachitatu, perchlorethylene, akhoza kukhala ofanana ndi malamulo atsopano a methylene chloride, kuphatikizapo chiletso ndi chitetezo chokhwima cha ogwira ntchito.