Definition/Meaning of 3 R's

REDUCE - to buy less and use less. Incorporates common sense ideas like turning off the lights, rain barrels, and taking shorter showers, but also plays a part in composting/grasscycling (transportation energy is reduced), low-flow toilets, and programmable thermostats. Includes the terms Re-think, Precycle, Carpool, Efficient, and Environmental Footprint.
REUSE - elements of the discarded item are used again. Initiatives include waste exchange, hand-me-downs, garage sales, quilting, travel mugs, and composting (nutrients). Includes the terms laundry, repair, regift, and upcycle.
RECYCLE - discards are separated into materials that may be incorporated into new products. This is different from Reuse in that energy is used to change the physical properties of the material. Initiatives include Composting, Beverage Container Deposits and buying products with a high content of post-consumer material. Within recycling there is distinction between two types:

--->Upcycle- converting low-value materials in high-value products (more desirable)

--->Downcycle - converting valuable products into low-value raw materials (less desirable)

Retrieved from: http://en.wikipedia.org/wiki/Reduce,_Reuse,_Recycle