Answer:
The primary difference between organic vs. inorganic compounds is that organic compounds always contain carbon while most inorganic compounds do not contain carbon. Also, nearly all organic compounds contain carbon-hydrogen or C-H bonds.
Step-by-step explanation:
Inorganic: 1. ammonia 2. all metals 3. calcium
Organic: 1. grass 2. wood 3. flowers
Inorganic materials would take the longest to break down in a landfill.