Compost Bin 话题后续

Yesterday，I met my colleague who has been using compost bins. 

I asked whether compost bins would produce  microbes or attract any little animals.

He said no and showed me the pictures of his two compost bins！

To my surprise，he even put papers in it.：）

I think compost bins are good for those who have yards with lots of plants.：）

 

His compost bin looks like this：