Gaskiya mai ban sha'awa game da kwal Wata babbar dama ce don ƙarin koyo game da ma'adinai. A yau irin wannan man fetur shine ɗayan da aka fi sani a duniya. Ana amfani dashi don dalilai na gida da na masana'antu.
Don haka, a nan akwai mafi kyawun abubuwa game da kwal.
- Burbushin duwatsu shine ragowar tsoffin shuke-shuke waɗanda suka daɗe da zurfafawa a ƙarƙashin ƙasa na dogon lokaci, a ƙarƙashin matsi mai yawa kuma ba tare da iskar oxygen ba.
- A cikin Rasha, hakar kwal ya fara a karni na 15.
- Masana kimiyya sun ce kwal shi ne farkon burbushin halittar da mutane suka yi amfani da shi.
- Wani abin ban sha’awa shi ne cewa China ita ce kan gaba a fagen cin gawayin kwal.
- Idan gawayin ya wadatar da sinadarin hydrogen, to sakamakon haka zai yiwu a sami mai mai ruwa kwatankwacin halayensa da mai.
- A tsakiyar karnin da ya gabata, kwal ya samar da kusan rabin samar da makamashi a duniya.
- Shin, kun san cewa har yanzu ana amfani da kwal don zane?
- Tsohon ma'adinin kwal a doron duniya yana cikin Netherlands (duba abubuwa masu ban sha'awa game da Netherlands). Ya fara aiki a cikin 1113 kuma ya ci gaba da aiki cikin nasara a yau.
- Wata gobara da ta tashi a ajiyar Liuhuanggou (China) har tsawon shekaru 130, wanda gaba daya aka kashe ta kawai a shekarar 2004. A kowace shekara, wutar na lalata sama da tan miliyan 2 na kwal.
- Anthracite, ɗayan nau'ikan kwal, yana da ƙimar mafi girman kuzari, amma yana da saurin kunnawa. An ƙirƙira shi daga gawayi lokacin da matsi da zafin jiki ya tashi zuwa zurfin zuwa kilomita 6.
- Gawayi ya ƙunshi ƙananan ƙarfe masu haɗari kamar su cadmium da mercury.
- Manyan masu fitar da kwal a yau sune Australia, Indonesia da Russia.
