from a google search:
EGG WHITE--A cloudy white in a raw egg is caused by carbon dioxide and indicates freshness. As the egg ages, the carbon dioxide escapes through the pores of the egg, and the white will become less cloudy. A pinkish or greenish-blue raw egg white possibly indicates spoilage with a certain bacteria (Pseudomonas spp). We recommend not eating these eggs.
and a little more info:
Green whites
Greenish color in egg whites is usually due to riboflavin (vitamin B2), that is a desirable component. So there is nothing wrong with greenish whites that are most frequently observed in fresh, high-quality eggs.
Cloudy whites
This condition is noticeable in freshly laid or oil-treated fresh eggs. It is caused by the naturally occurring carbon dioxide. As the egg ages and this gas escapes, the white becomes clearer. The quality and flavor of eggs with cloudy whites is excellent.
