Many charities will take donations of unused disposable diapers and second-hand cloth diapers that are in good condition.
Throw it out - Black Cart
Soiled disposable diapers and diaper liners should be double-bagged, tied and placed in your black cart.
Biodegradable/compostable diapers cannot go in the green cart. These diapers often contain elastics, tabs and other non-compostable material that will not completely breakdown during the composting process therefore contaminating the finished compost.
Never flush diapers down your toilet as it may be harmful to the environment and may damage the pipes in your home.