M'masiku ano, ntchito zapadziko lonse lapansi zakhala njira yofunika kwambiri yoyendetsa chuma padziko lonse lapansi,
Kumbuyo kwa mayendedwe a ndege kumatha kutumizidwanso ku ndege ndi kugwiritsa ntchito ndege kuyambira pazaka za zana la 20, ndege za ndege zakhala zikuyenda bwino kwambiri padziko lonse lapansi. komanso mosamala {{4}
Kufunika kwa mayendedwe a mpweya pamalonda kumadzionetsera. Chisankho {{4}
Kachiwiri, kuchita bwino komanso kudalirika kwa mayendedwe a mpweya kumapereka chitsimikizo champhamvu chokhazikika cha malonda apadziko lonse lapansi {{}}
Kuphatikiza apo, monga "njira yobiriwira" ya malonda apadziko lonse lapansi, mayendedwe a mpweya wathandiza kupititsa patsogolo chitukuko cha dziko lonse lapansi
Kuphatikiza apo, popanga kukula kwa mafakitale omwe akutuluka monga malo owonera magetsi komanso ozizira