Green Hierarchy

• Reduce :e.g. To reduce the amount of packaging used for commodities 
• Reuse: employing old building or components for new application with minimnal alteration 
• Recycle : conversion of the previous material into some other form , when reuse is not possiblility 
• Recover : denote energy recovery from materials with limited recycling options 
• Dispose : should only considered when all of the above options have been excluded .