How do you dispose of egg shells?

Eggshells can be disposed of in several environmentally friendly ways. They can be crushed and added to compost, where they break down and provide calcium to the soil. Alternatively, you can rinse them and place them in your garden as a natural pest deterrent or add them to a worm bin as a food source for worms. If you prefer not to use them in gardening, simply toss them in the trash, but composting is the most sustainable option.