... absorbing 12.5 tones of Carbon dioxide(CO2),and releasing4.6 tones of Qxygen(O2) CharacteristicsWPCWoodMoisture ... no Contraction/expansionDistorting effected by chang of moisture and temperatureUV ResistanceHigh Grade UV ResistanceEasily effected by UVFading ... Scratched, wood Grained,grooved4.ColorLight brown, Brown, Dark brown, Light gray, Dark gray, Black,white,Wood,Cedar,Copper brown,Sandalwood, ...