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In the past year or so, all things "green" have become a hot fad. Sorting through green claims remains a difficult task.

Two new studies have shed light on some of the primary culprits in the degradation of the Gulf of Mexico and the Mississippi River.

A wide variety of environmental news, opinions, and technical information is available at Earth Portal. The site provides information that you may not readily encounter via your usual sources, along with links to selected information published by others.

As of Oct. 2, 2007, NOAA and EPA are making daily local forecasts of ground level ozone for the entire contiguous U.S. The latest upgrade adds forecast information for 11 Western states, and improves forecasting for 6 others.

You may have thought that the billboard wars were largely over, after the efforts of Lady Bird Johnson, the passage of the Highway Beautification Act of 1965, and the subsequent adoption of regulations by states and local communities.

Three reports being released by the National Academies' National Research Council have strong environmental links. Reports concern water, biofuels and ongoing conflicts between national security and the open flow of scientific information.

The US Army's plans to expand operations at 17 facilities in 12 states over the next six years to accommodate up to about 75,000 troops and support personnel will have major environmental impacts.

When considering the impact of transportation on the environment, most people think of cars. However, air travel is gaining increasing scrutiny as a climate change culprit.

Big banks take greenhouse gas emissions into account when assessing risks of financing power plants

In 2005, at least 3,600 facilities violated their water discharge permits more than 24,000 times, according to a US Public Interest Research Group report released Oct. 11, 2007.