Tsiku la Arbor Day ku California (March 7-14, 2010) latsala pang'ono, ndipo kuthandiza mabungwe omwe akukhudzidwa ndi kubzala mitengo patchuthi chino, DriWater, Inc., ndiwokonzeka kupereka madzi omwe atulutsidwa nthawi. Popeza zobzala izi nthawi zambiri zimakhala zongodzipereka komanso mu ...