Instead of throwing or disposing of your barbeque grill, you can actually turn them into flower carts for your own personal use. However, if you do wish to dispose of them, you can recycle them piecewise: the propane tank must be completely empty of its gas, and then the propane company (or local propane company) can take it away. The rest of the grill can be recycled at local grill recycling centers (if you have them) if not, then you must take the grill apart, recycycling the metal parts where appropriate and recycling the platic parts where appropriate. The electrical parts also must be recycled. The easiest way to find out is by calling your local sanitation department and asking them for advice on how to dispose of your grill.