"We're going deeper into debt on our groundwater use," Postel said ... Some of Earth's groundwater is fossil water, created when Earth's climate was far different. Today such water is as finite ...

ABC News is taking Earth Month to explore what’s happening to water from different lenses ... a popular plumbing material used in the 1800s. Despite the warnings, many cities continued to ...

One that wiped out three quarters of all plant and animal species when it hit the Earth ... water. Investigate the properties of water including boiling point, melting point, density (at different ...