What is a global cleaner?

1, Deng Kelang is a grassland cleaner.

Seagulls pick up the leftovers discarded by people on the ship, so they have the nickname of harbor cleaner.

3, small fish, they can make the river clean, they are cleaners in the sea.

4, crow, its sense of smell is very sensitive, a little rotten taste, it will fly in time to "clean up" is a cleaner on the grass.

5. Earthworms, except stones, bricks, glass, metal, rubber, etc. , can digest all other rotting organic wastes and domestic garbage and convert them into organic fertilizers.

6. Vultures mainly feed on the carcasses of large animals and other decaying animals. They are called "cleaners on the grassland" and often fly over empty mountains and plains to peep at the bodies of animals.