One of the benefits of living in California, according to this 9th-grader, is inhabiting a environment that provides a critical link between humans and the Pacific Ocean.

The effluent lake in Fountain Hills makes for a spectacular fountain—one that can erupt up to 560 feet. But what quality of lake is created with the use of recycled wastewater?

How do the many trees and shrubs that live at the bottom of dry riverbeds survive flash floods? Investigate the answer with this 7th-grader from Arizona as he monitors a neighborhood wash.

Decades after the fictitious Martian visit in the War of the Worlds broadcast, Grovers Mill, New Jersey, is undergoing a very real reconstruction. Investigate its environmental impact with this 9th-grader.

Find out how this 10th-grader from Oregon was able to take the back-and-forth motion he observed in Jupiter's moons and use it to figure out their circular motions.

Meet a 12th-grader from Louisiana who's seeking an environmentally friendly solution to animal waste. His motivation? Ten family cats and the four smelly litter pans he's charged with cleaning!

For as long as she can remember, this 7th-grader from Hawaii has helped her family destroy Kahili ginger. But was she helping or hindering the native environment? See the results of her investigation.

With this 11th-grader from Iowa, investigate a former munitions and nuclear weaponry plant that was placed on the EPA's Superfund list in 1989 and test the water quality of neighboring creeks today.

Because professional observatories can rarely offer the large blocks of time needed to search for variable stars, this 12th-grader from Maine outlines a system for using amateur equipment.

This 10th-grader from New York first became fascinated with bats when she observed their "magical movements" in Israel's Negev Desert as a young child. Trek with her to Ontario to study their behavioral ecology.