Kugwira ntchito mwakhama kwa zaka zambiri kwapindula

Zaka zogwira ntchito molimbika zapindula, kugwiritsa ntchito kwa ozoni kudavomerezedwa m'mafayilo osiyanasiyana ndipo majenereta athu a ozoni adazindikirikanso ngati zinthu zodalirika zogwira ntchito bwino kwambiri ku China.


Nthawi yotumiza: Jun-11-2007