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Bbazu lyakukwabilila busena lyaku Amelika lyakakankaizya kukasya kubelesya musamu wa methylene chloride kuliboonse babelesya alimwi amumakkampani manji. Muzeezo mupya ooyu waboola aawo mbunga niyakamanizya kulanga ntenda mumweezi wa Nalupale 2022 kwalo kwakajana kuti kujatikizyigwa azintu zipa kuti kube ntenda kubuumi mbuli bulwazi bwa chitaka a kkansa.
Methylene chloride ilajanwa muzintu zyiingi, kubikkilizya azintu zyakunamatika, zintu zigwisya penti, azintu zigwisya mafuta. Alimwi chibelesegwa loko mbuli chintu chibelesegwa mukupanga makemikalu aambi. Kabunga kakwabilila busena bwaku Amelika kayeeyela kuti babelesi bainda ku 900,000 abasikuula bali 15 miliyoni balajatikizyigwa a methylene chloride lyoonse.
Musamu ooyu ngowabili kulinguwe kunsi amulawu wa Toxic Substances Control Act (TSCA) wakabambululwa, walo uuyanda kuti Environmental Protection Agency ilangisisye bukwabilizi bwamakemikalu mapya aaliwo kale. Makanze aambunga ngakuti agwisye kupanga, kubamba akwaabila methylene chloride mukati kamyeezi ilikkumi amusanu.
Kubelesya kumwi kwa methylene chloride takuli mukulesyegwa ooku, kubikkilizya akubelesya kwawo mbuli musamu. Mbuli chitondeezyo, chiyoozumanana kubelesegwa mukupanga hydrofluorocarbon-32 refrigerant, eeyo yakalungisigwa kuti ibe nzila imwi iikonzya kubelesegwa kupya kwanyika yoonse antoomwe akumana kwa ozone.
"Tusyoma kuti methylene chloride ilikwabilidwe kubelesyegwa abasikalumamba aamfulumende," Michal Friedhoff, mweendelezi wa Environmental Protection Agency's (EPA) Office of Chemical Safety and Pollution Prevention, wakaamba kumuswaangano wabasikumwaya makani kakutanaambilizyigwa. "EPA iyooyanda kuti kube ntaamu yakukwabilila lukwabililo lwababelesi."
Tubunga tumwi tukwabilila busena twakatambula muzeezo mupya. Nokuba boobo, bakatondeezya kulibilika aatala akulesyegwa amulawu uukonzya kuzumizya kuzumanana kubelesya methylene chloride kwamyaka iitasiki kukkumi.
Maria Doa, mupati wamilawu yamakemikalu ku Environmental Defense Fund, wakati kubelesya kwachiindi chilamfu ooku kuyoozumanana kuleta ntenda kubantu bakkala afwaafwi amasena aatabbadelwi. Doa wakati Environmental Protection Agency yeelede kufwiinsya chiindi chakugwisigwa naakuti kubikka milawu imwi aatala akuzwa kwa methylene chloride kuzwa kumafakitali aaya.
Aawo, mbunga ya American Chemistry Council, kabunga kabasambazi kaiminina basikupanga misamu, bakaamba kuti milawu yakayeeyelwa ilakonzya kuchincha nzila zyakusambala. Kabunga kakaamba muchibalo kuti kucheya kwakufwambaana kwakupanga methylene chloride kuyoopa kuti kube kucheya kwiinda haafu. Kabunga kakaamba kuti kugwisigwa ooku kulakonzya kuba "ampindu mpati" kumakkampani aambi mbuli misamu, ikapati kuti "basikupanga basala kuleka kupanga."
Methylene chloride ninzila yabili akati kamisamu iilikumi mbunga yakukwabilila busena njiiyanda kulanga-langa ntenda zikonzya kuchitika kubuumi bwabantu abusena. Chakusanguna, ni asbestos. Freedhoff wakati milawu yachintu chatatu, perchlorethylene, ilakonzya kukozyanya amilawu mipya ya methylene chloride, kubikkilizya akukasya akukwabilila babelesi.