From the earliest life forms to life on earth as we know it today, water has been the one essential constant . Covering roughly seventy percent of the earth’s surface, only a mere fraction is available as freshwater and of that, an even smaller proportion is available for human use and we are only just beginning to truly understand the nature of this most precious and limited resource. In addition to its life sustaining role, water is also one of the most destructive forces on earth, carving breath taking gorges and valleys, yet disasters related to water are responsible for large scale loss of life as well. In its different forms water supports ocean life, retains precious atmospheric samples dating back thousands of years, is a muse for writers, artists, and sculptors, as it tenuously supports a human population of six billion and growing.
The Kunene River (also Cunene River) is a river is southwestern Africa, 1050 kilometers long, with its watershed primarily within the nation of Angola but also drawing...
Water pollutionLast Updated on 2014-11-17 12:18:45Water pollution is the contamination of natural water bodies by chemical, physical, radioactive or pathogenic microbial substances. Adverse alteration of water quality presently produces large scale illness and deaths, accounting for approximately 50 million deaths per year worldwide, most of these deaths occurring in Africa and Asia. In China, for example, about 75 percent of the population (or 1.1 billion people) are without access to unpolluted drinking water, according to China's own standards. Widespread consequences of water pollution upon ecosystems include species mortality, biodiversity reduction and loss of ecosystem services. Some consider that water pollution may occur from natural causes such as sedimentation from severe rainfall events; however, natural causes, including volcanic eruptions and algae blooms from natural causes constitute a minute amount of the... More »
PollutionLast Updated on 2014-11-09 17:40:04Pollution is environmental contamination that results in harm or death to living organisms. Most pollution is in the form of chemical additions to air, water or soil; however, in modern times starting in the mid-twentieth century noise and light have been considered as pollution sources. Most pollution is man-made, with natural fluctuations in atmospheric composition, surface water bodies and soil considered temporal gyrations in the Earth's natural history. The chief driver of pollution is the massive growth in human population, which induces the proximate causes of intensive agriculture and extraordinary industrial output. The United Nations and the Blacksmith Institute are two prominent organisations that tabulate locales of the greatest pollution intensity; while their listings do not correspond precisely, the overlap countries that both entities agree are the worst polluted... More »
FreshwaterLast Updated on 2014-09-06 18:32:23
The definition of freshwater is water containing less than 1000 milligrams per liter of dissolved solids, most often salt. The global distribution of freshwater resources varies greatly from region to region (see Figure 1). An 'inventory' of Earth's waters shows that approximately 97% of the global water supply is found in the oceans, which are saline. A very small amount of salty water is also located in saline lakes (e.g., the Caspian Sea). The remaining water inventory (3%) is 'freshwater'. Permanent ice (e.g., continental and mountain glaciers) is the largest freshwater storage on Earth, accounting for about 2% of the total global supply - or nearly 69% of the total freshwater supply. Freshwater is also found beneath the Earth's surface as groundwater (approximately 30% of the total freshwater supply) and in surface water storages such as lakes, streams,... More »
Lubbock Lake Landmark Last Updated on 2014-08-21 20:56:24
The Lubbock Lake National Historic and State Archeological Park, known locally as the Lubbock Lake Landmark, is an archeological and natural history preserve located in Lubbock, Texas, USA. The 300 acre preserve is located in Yellowhouse Draw, an intermittent tributary of the Brazos River. This reserve, which is managed by the Museum of Texas Tech University, is important because it contains evidence of nearly 12,000 years of use by humans as well as records of now extinct species that formerly lived in this area. It is one of the few places in North America known to have a complete record of human existence from the Paleo-Indian culture all the way through the Archaic, ceramic, and Prehistoric cultures.
Lubbock Lake Landmark received its name from a reservoir that was created in the 1930s. This area housed a natural spring fed lake until the spring began to... More »
National Oceanic and Atmospheric Administration (NOAA), United StatesLast Updated on 2014-06-30 19:00:15
The National Oceanic and Atmospheric Administration (NOAA) is a federal agency within the United States Department of Commerce. As a science-based operational agency tasked with monitoring climate and changes in the environment, NOAA is responsible for the study of the atmosphere and the oceans. The agency issues daily weather forecasts and storm warnings, restores coastline, aids the flow of marine commerce, and manages fisheries. NOAA's activities facilitate weather- and climate-sensitive economic activity that account for roughly one-third of the country's gross domestic product (GDP). The agency also responds to natural and man-made maritime disasters, operates a complex network of oceanographic, meteorological and atmospheric data-collecting products and services, and manages marine mammals, marine endangered... More »
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