National Scenic Trails A chart listing U.S. National Scenic Trails.		Emissions and Global Warming Describes how emissions contribute to global warming.
Extreme Geographical Points of the United States A chart listing the extreme geographical points of the United States.		Will Global Warming Change the U.S. Climate? Describes how the climate might change in the United States, due to the effects of global...
Rivers of the United States A list of rivers, 350 miles or longer, in the United States.		Global Warming and Global Temperature Projection of the temperature change that may occur due to global warming.
Highest Mountain Peaks in the United States A chart listing the highest mountain peaks in the United States.		Global Warming: What It Is . . . Provides a definition of global warming.
Highest, Lowest, and Mean Elevations in the United States, by State A chart of the highest, lowest, and mean elevations in the United States, by state.		Global Warming: Climate and Weather Describes the difference between climate and weather.
North American Continental Divide A brief explanation of the North American continental divide.		Global Warming and Climate Description of global warming's effect on the climate.
World Heritage Sites in the United States A list of World Heritage sites in the United States.		Global Warming: Climate's Come a Long Way! Describes the many changes Earth's climate has undergone, from ancient times to present-day.
Eclipses of the Sun and Moon, 2005 - 2012 An article listing the dates and places of eclipses occurring between 2005 and 2012.		Global Warming: What Is the Climate System? Describes the components of the climate system.
The Global Environment Outlook: An Overview A list of continents and the major environmental issues in those areas.		Global Warming: Can We Change the Climate? Describes the things people do that send greenhouse gases into the air, making our planet...
Major Air Pollutants A list of pollutants, where they come from, and what their effects are.		Global Warming: The Climate Detectives Describes some of the ways that scientists gather evidence about climate, both past and...