image shows urban growth in the Washington D.C. metropolitan region
Jan 15, 2000Monitoring urban growth

Contributor: Jeffrey G. Masek, NASA Goddard Space Flight Center Traffic jams and air pollution in large metropolitan areas are sure signs of expanding populations. Across the globe, 50 percent of the world’s population now lives in urban areas, a gain of over one billion individuals in the last 30 years. In the United States, urban […]

Jan 15, 2000Monitoring crop and forest harvests

Contributor: David Skole Michigan State University Even though tropical deforestation is a well-known problem, the rate of deforestation in the tropics is currently known to only a very general degree. Recent research using Landsat images of forest loss over a decade from the mid-1970s to mid-1980s found that an average of 6200 square miles of […]