Categories

[[Category:Example]] [[Category:Easy]] [[Category:Medium]] [[Category:Difficult]] [[Category:High Technology]] [[Category:Dangerous]] [[Category:Less than 10 US$]] [[Category:Less than 50 US$]] [[Category:Between 50 and 200 US$]] [[Category:More than 200 US$]] [[Category:One Person]] [[Category:Up to 5 Persons]] [[Category:More than 5 Persons]] [[Category:Global Technology]] [[Category:Local Technology]] [[Category:Urban Environment]] [[Category:Montaneous Environment]] [[Category:Forest Environment]] [[Category:Temperate Climate]] [[Category:Tropical Climate]] [[Category:Arid Climate]] [[Category:Monsoon Climate]] [[Category:Wate]] [[Category:Energy]] [[Category:Agriculture]] [[Category:Forest]] [[Category:Food Processing]] [[Category:Health]] [[Category:Ideas]] [[Category:Small Business]] [[Category:Products]] [[Category:Construction]] [[Category:Transportation]] [[Category:Community]] [[Category:Mecanics]] [[Category:Informatics]] [[Category:Plastic container]]