The difference between ambition and greed

Nowadays, most of the people doesn't don't notice know the difference between ambition and greed.
The A person who desires everything just for sake to of owning it, the person who wants all the time to own buy new things all the time without being satisfied with what he has, and the person who takes care by of himself without caring about others is a greedy person.
Greedy person people hope the for other people to lose or hurt in their valuable things things that are valuable to them or to get hurt. 

The Ambition is to interest of in success and looking forward to achieving your dreams.

An ambitious person doesn't hope for others to lose their valueables and he is thinks about helping others.

Both of greedy and ambitions people desire new things all the time and they are not satisfied with what they have.
But the difference between them is that
ambition is a good adjective quality that everybody hopes to have, while 
greedy is a bad adjective quality <em>everybody hat it.</em>
:)

*Did you mean everybody has it? or everybody hates it?

Also: Just a note:

Ambition is a noun; ambitious is an adjective: an ambitious person has ambition.

Greed is a noun; greedy is an adjective: a greedy person has greed.