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Expert-reviewed information about the Earth.  For everyone.

 

 

  • Fluorine Featured Article Fluorine Fluorine

    Fluorine is a highly reactive chemical element with atomic symbol F. Having the atomic number nine, fluorine is the lightest halogen. Fluorine is a yellow-green gas... More »

  • Limestone Featured Article Limestone Limestone

      Limestone  is a sedimentary rock whose chief mineral component is calcite (calcium carbonate: CaCO3). Limestone can be formed by precipitation of calcite... More »

  • Carpenter bee Featured Article Carpenter bee Carpenter bee

    This hexapod (six-legged) insect is a bee in the subfamily Xylocoinae of either the genus Ceratina or Xylocopa that makes its nest in wood or plant stems. Along... More »

  • Biological diversity in the Himalayas Featured Article Biological diversity in the Himalayas Biological diversity in the Himalayas

    Stretching in an arc over 3,000 kilometers of northern Pakistan, Nepal, Bhutan and the northwestern and northeastern states of India, the Himalaya hotspot includes all of... More »

  • Composting tips Featured Article Composting tips Composting tips

    Composting turns household wastes into valuable fertilizer and soil organic matter. All organic matter eventually decomposes. Composting speeds the process by providing an... More »

  • Trinity Site, New Mexico Featured Article Trinity Site, New Mexico Trinity Site, New Mexico

    Trinity Site, Alamogordo Bombing Range, New Mexico ( 33°40'30.00"N, 106°28'30.00"W) was the site of the first atmospheric atomic bomb test which took... More »

  • Endangered species Featured Article Endangered species Endangered species

    An endangered species is a biological taxon that is at risk of becoming extinct in a proximate time frame much sooner than the long term horizon in which species typically... More »

  • Gymnosperm Featured Article Gymnosperm Gymnosperm

    A gymnosperm is one of a number of non-flowering seed bearing vegetation species, including conifers, cycads, Ginkgo and Gnetales.  These species arose first in the... More »

  • Dugong Featured Article Dugong Dugong

    The Dugong, often referred to as the sea cow, is actually more closely related to elephants than to the bovine namesake.  Throughout much of their range, the Dugong has... More »

Recently Updated
Angolan mopane woodlands Last Updated on 2014-12-25 11:42:39 WWF Terrestrial Ecoregions Collection The Angolan Mopane Woodlands are located in northern Namibia and  southern Angola, completely surrounding the Etosha Pan, which is considered a separate ecoregion. Mopane trees (Colophospermum mopane) dominate the vegetation, and are an essential resource for both the people and wildlife of the region. African Bush Elephants (Loxodonta africana) utilize almost every part of the mopane tree, and the region supports other large herbivores, including the critically   endangered   Black Rhinoceros (Diceros bicornis). Species richness in this ecoregion is high, especially in comparison with the arid deserts to the west. Conservation potential is high in Namibia, due to the vastness of the desolate Namib Desert and the presence of Etosha National Park, and increasing awareness of conservation... More »
Denmark Last Updated on 2014-12-19 12:32:19 Denmark is a nation of just over five-and-a-half million people in Northern Europe, bordering the Baltic Sea and the North Sea, on a peninsula north of Germany (Jutland) and includes roughly 500 islands, including several major islands (Sjaelland, Fyn, and Bornholm).  It is a part of the generally fertile and mostly agricultural region known as the North European Plain. This entire region is generally flat to slightly rolling and is overlain with glacial deposits. Denmark also includes the Faroe Islands and Greenland. Its major environmental issues include: air pollution, principally from vehicle and power plant emissions; nitrogen and phosphorus pollution of the North Sea; drinking and surface water becoming polluted from animal wastes and pesticides Flooding is a threat in some areas of the country (e.g., parts of Jutland, along the southern... More »
Marine biodiversity Last Updated on 2014-12-15 19:53:24 Biodiversity is now commonly defined as the variety of life in genes, species and habitats. According to the definition of the Convention on Biological Diversity, biodiversity is the variability among living organisms from all sources, including inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems. The three domains of life, bacteria, archaea and eukarya are present in the marine environment. In addition there are viruses. About 230,000 species of marine plants and animals have been scientifically described and a few thousand bacteria and archaea. This known biodiversity only represents a small fraction of the number of species existing, except for the macrophytes and seagrasses which are living in coastal environments and, in general, for the pelagic... More »
Malaysia- FAO's Information System on Water and Agriculture Last Updated on 2014-12-07 21:15:44 Malaysia is situated in southeast Asia. It consists of two regions: peninsular Malaysia in the west lying between Thailand and Singapore, and the states of Sabah and Sarawak located in the east on the island of Borneo. The two regions are separated by the South China Sea. The total land area of the country is 328 550 km². Malaysia is a federal country, divided into 13 states plus the federal territories of Kuala Lumpur and Labuan Island.. The Food and Agriculture Organization of the United Nations (FAO) leads international efforts to defeat hunger. Serving both developed and developing countries, FAO acts as a neutral forum where all nations meet as equals to negotiate agreements and debate policy. FAO is also a source of knowledge and information. In peninsular Malaysia, a mountainous spine known as Banjaran Titiwangsa sepa-rates the east of the... More »
Fisheries and aquaculture Last Updated on 2014-12-07 21:08:51 In 2002 the global production from fishing and aquaculture combined reached about 133 million tonnes. The global yield from capture fisheries is stagnating, but aquaculture has been expanding. The quantities of fish captured remained stable at about 93 million tonnes per year between 1999 and 2002. China and Peru are leading the top ten of countries with the largest catches. The same countries have remained in the top ten for over a decade. Oceans and seas provide 90% of the world's fishery catches. During the past decade marine catches brought to land increased slightly compared to the preceding decade. It should be noted that the quantity of marine fish caught and discarded fell by several million tonnes in the same time period. Trends vary greatly across different regions and for different species. The species yielding the largest harvest is the Peruvian... More »