Adam completed the Earth

Muslims don't believe in the original sin not do we believe that mankind is being punished for it. Rather we believe Adam (upon him peace) was sent down to earth to complete the earth. God said he was going to send a vivegerent on the earth and when he did the earth was complete.

Its like building a house, is it complete without people who live in it? No, now that there are people living in it, its serving its purpose.