M'zaka zaposachedwa, kuwonongeka kwa zomangamanga kukuchulukirachulukira, zomwe zabweretsa mavuto ku dipatimenti yoyang'anira mizinda. Boma lazindikira pang'onopang'ono kufunika kwa chithandizo chazinthu zowononga zomangamanga; Kuchokera kumalingaliro ena, zinyalala zomanga ndi mtundu wachuma. Pambuyo honcha njerwa kupanga mzere, izo zikhoza kukhala latsopano khoma zinthu kusowa mu masiku ano ndi ntchito mokwanira chuma.

Fly ash ndiyo imaipitsa kwambiri chilengedwe. Ku China, zotulutsazo zimafika matani masauzande ambiri, ndipo ambiri aiwo sagwiritsidwa ntchito, omwe samangowononga chuma, komanso amayambitsa kuwonongeka kwakukulu kwa chilengedwe. Ndipotu, fly ash ndi chinthu chabwino chopangira njerwa. Pambuyo kupanga mzere wopanga njerwa za honcha, ukhoza kukhalanso chida chatsopano champanda chosowa masiku ano, chomwe chagwiritsidwa ntchito mokwanira.

Osati zinyalala zomangira, phulusa la ntchentche, michira, kusungunula zitsulo ndi zinyalala zina zolimba, makina a njerwa osawotchedwa a Lei Shi Chengxin amatha kusandutsa zinyalala kukhala chuma, ndipo "mwana" wopangidwa akugwiranso ntchito pakusunga madzi, khoma, nthaka, dimba ndi zina!