Habitats & Wildlife. Only 7% of the country's landscape is in a riparian zone, only 2% of which still supports riparian vegetation. The U.S. Fish and Wildlife Service estimate that 70% of the riparian habitat nationwide has been lost or altered. 9 million cubic miles (2.5%) is in aquifers deep below the earth's surface. 2  7 million cubic miles (2%) is frozen in polar ice caps. 3  53,000 cubic miles of water pass through the planet's lakes and streams. 4  4,000 cubic miles of water is atmospheric moisture.
In some cases, symptoms can be observed even up to three weeks. Viral conjunctivitis can last for one or two days and it does not require any particular medical treatment. Usually, a child suffering from viral pink eye can return to daycare or an adult can join work within 3-5 days.
If your pink eye is caused by a common viral infection and no other complications occur, then your eyes should clear up within a few days to two weeks. Pink eye also can be caused by bacterial conjunctivitis, which â even with treatment such as prescription antibiotic eye drops â can last up to a month or longer. However, with this type of pink eye, people should no longer be contagious 24 hours after antibiotic treatment begins. Recommended For You.