What are some practical uses for discarded lobster and crab shells?

Lobster and crab shells are often discarded as waste, but they actually have a number of practical uses. Here are a few examples:

* Fertilizer: Lobster and crab shells are a good source of calcium, magnesium, and other minerals that plants need to grow. They can be crushed and added to soil as a natural fertilizer.

* Animal feed: Lobster and crab shells can be ground up and used as a protein supplement for chickens, pigs, and other animals.

* Pest control: Lobster and crab shells can be used to repel pests such as ants and fleas. The shells can be crushed and sprinkled around the perimeter of a home or garden.

* Water filtration: Lobster and crab shells can be used to filter water. The shells can be crushed and used as a filter medium in a water filter.

* Building materials: Lobster and crab shells can be used as a building material. The shells can be crushed and used to make bricks, tiles, and other building materials.

* Art and crafts: Lobster and crab shells can be used to create art and crafts. The shells can be used to make jewelry, mosaics, and other decorative items.

By finding practical uses for discarded lobster and crab shells, we can reduce waste and create new products that benefit the environment and the economy.