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philippines recycle reduce reuse 3 r's three r's rehabilitation best practices ecology healthy balance nature harmony environmental laws environmental education education act of 2008 philippine replubic act section 5 national environmental awareness republic act no. 9512 cause symptoms pineal cyst reproductive hormones circadian rhythm neurodegeneration sex organs pigment cells photoperiodic functions patterns sleep wake modulation hormone melatonin endocrine organ third eye brain human brain pineal gland food poisoning in school san jose elementary school food poisoning human-induced hazard hydrometeorological hazards tropical depression tropical depression winnie typhoon typhoon harurot philippines 2005 philippines 2003 disaster in the philippines 2005 2003 disasters methods blur sharp white black dark light darkness brightness hue saturation cropping crop resizing resize image manipulation manipulation image business decisions business sector sales of goods sales market goods market demands money votes high money votes high demand big data producers economy and demand significance of demand meaning of demand demand economics business and economy economy