US Geological Survey
U.s. Geological Survey: Rain
At this site from the U.S. Geological Survey you can find out what makes rain such a valuable resource. Included is a chart that tells how much rain different cities in the United States receive. Click Home to access the site in Spanish.
CK-12 Foundation
Ck 12: Earth Science: Coastal Pollution
[Free Registration/Login may be required to access all resource tools.] How pollution creates dead zones in the ocean.
CK-12 Foundation
Ck 12: Earth Science: Coastal Pollution
[Free Registration/Login may be required to access all resource tools.] How pollution creates dead zones in the ocean.