Wopanga WelderChiyambireni kukhazikitsidwa kwake, wakhala m'modzi mwa atsogoleri apadziko lonse lapansi popanga zida zamapaipi, zida zamakina, ndi zida zowotcherera zitoliro za pulasitiki. Likulu lathu ku Wuxi, China, takhala tikudzipereka kuti tipereke zinthu zapamwamba kwambiri ndi ntchito zomanga padziko lonse lapansi kuyambira pomwe tidayamba.