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Cardboard Tool Bag
Crazy Circuits: an Open Source Electronics Learning System
Energy Efficient Tiny House on Wheels
OccuPod - an Old Storm Drain Pipe Turned Into a Warm and Comfortable Living Space!
Make a Tumbling Composter
How to Make a Realistic Faux Neon Sign - Super Bright!
Plastic Cup Sphere Light
How to Carve Miniature Wooden Wizards
DIY OFF GRID SOLAR SYSTEM
How long a grafted plant should stay in plastic bag?
How to Make a Garden Fountain Out Of, Well, Anything You Want
Concrete Soap Dish DIY
REcycle - How to Build a Two Wheel Cargo-bike
A scientific paper from Indian Agricultural Research Institute, called Formulation of a low-cost medium for mass production of Spirulina, says: "Spirulina, being a non-diazotrophic cyanobacteriumrequires nitrogen in the medium, which is generallyprovided in the form of NaNO3."