Actually humans are at fault for that. When Adam and Eve disobeyed God they brought sin into the world. The result of sin are things like hunger, poverty, illness, and finally death.
@Iam-God placed the tree there for a choice. Instead of forcing Adam and Eve to obey him, he gave them a choice. The tree was the choice. It was not tempting by itself, it was nothing more than a nuetral choice. Satan made it tempting, but remember that he was also punished.
Adam and Eve were cursed and so was their family line. Why are we punished for their mistakes? Well, why do abusive children suffer because of their parents mistakes? Adam and Eve were responsible for us, but they messed it up. God gave us a way out though, and that is the ability to be with him.