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...
IndiaLast Updated on 2015-09-01 11:18:16India is one of the major nations of the world. With 1,205 million people, it has the second largest population (after China).
It is bordered by the Arabian Sea and Indian Ocean in the south, east and west. To the North, it borders Bangladesh, Bhutan, Myanmar (Burma), China, Nepal, and Pakistan. India has a long and complex history reflected in its intricate mixture of ethnic groups, languages and cultures.
While, density populated, India is home to a wide range of varied ecoregions with important biodiversity. Its major environmental issues include:
air pollution from industrial effluents and vehicle emissions;
water pollution from raw sewage and runoff of agricultural pesticides and herbicides;
tap water is not potable throughout the country; and, its huge and growing... More »
Nuclear powerLast Updated on 2015-08-28 08:36:17Nuclear power is the generation of electricity from controlled reactions within the nucleii of atoms that release energy used to boil water, the steam from which drives a turbine to generate electricity . All commercial nuclear plants presently rely upon nuclear fission reactions.
As of 2010, approximately 14 percent of the world's electricity was derived from nuclear power, chiefly centered in the United States (with 31% of the world's total nuclear power capacity), France (16%), and Japan (10%).
The International Atomic Energy Agency (IAEA) reports that, as of November 21, 2012, there are 437 nuclear power reactors in operation in 30 countries, plus Taiwan. Another 64 reactors under construction in 14 countries which if operational today would increase the worldwide electrical generation capacity of nuclear power by 17%. One hundred and forty reactors have been permanently... More »
ComorosLast Updated on 2015-07-18 16:21:28Comoros is a nation of 730,000 people composed of three islands (Ngazidja or "Grande Comore", Mwali or "Mohéli" and Nzwani or "Anjouan") in the Indian Ocean, at the northern mouth of the Mozambique Channel, about two-thirds of the way between northern Madagascar and northern Mozambique.
Comoros also claims a fourth island Mayotte or "Mahoré" which is under French administration. One of the world's poorest countries, the islands comprising Comoros have inadequate transportation links, a young and rapidly increasing population, and few natural resources. The country is not self-sufficient in food production. Rice, the main staple, accounts for the bulk of imports.
The low educational level of the labor force contributes to a subsistence level of economic activity, high unemployment, and a... More »
Kaokoveld DesertLast Updated on 2015-07-14 14:38:13
WWF Terrestrial Ecoregions Collection
The Kaokoveld Desert represents the northern area of the vast Namib Desert. It is a harsh, arid landscape of rugged mountains, gravel plains and shifting sand dunes. Surface water is scarce, with only one perennial river flowing through the region, the Kunene River. However, the dry riverbeds transecting the area are the lifelines of the desert. They are well vegetated and are home to large mammals such as African Elephant, Black Rhino and Giraffe. The remainder of the landscape is poorly vegetated and extremely arid. Coastal fogs allow a range of interesting, desert-adapted animal species to survive in this low-rainfall environment. The relict gymnosperm Welwitschia mirabilis, which represents the sole surviving member of its family, is found throughout the ecoregion. The Kaokoveld Desert is well protected in... More »
HerbivoreLast Updated on 2015-06-11 10:34:01A herbivore is an animal that derives energy and nutrients by feeding on plants. Different types of herbivores eat different plant parts. For example, folivores feed on leaves, frugivores feed on fruits, granivores feed on seeds, pollinivores feed on pollen, and nectarivores feed on nectar. Herbivores can vary greatly in size, ranging from the largest terrestrial animals (elephants) and large marine mammals such as manatees and dugongs, to small insects, nematodes, and thrips. Herbivores are primary consumers (they receive their energy by consuming primary producers), so they play an important trophic role in ecological communities and food webs.
Because mature leaves are low in nutrients, and difficult to digest because of their high cellulose content, animals use many different strategies to eat leaves. Animals that feed on grass leaves are generally... More »
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