Why do you sort your recycled rubbish?

It is difficult and expensive to sort out garbage that has all the things in it mixed up. Also the bits you want to recycle can be contaminated with grease and oil that then needs to be washed off. The sorting process is better done at the start. Thus if people sort out their garbage into the types requested it makes it easier to recycle that which can be recycled and this saves money and the environment of our planet.