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The Environment Portal
The natural environment comprises all naturally occurring surroundings and conditions in which living things grow and interact on Earth. These include complete landscape units that function as natural systems without major human intervention, as well as plants, animals, rocks, and natural phenomena occurring within their boundaries. They also include non-local or universal natural resources that lack clear-cut boundaries, such as air, water and climate.
The concept of the natural environment can be distinguished by components:
As human population numbers increase and as humans continue to evolve, human activity modifies the natural environment at a rapidly increasing rate, producing what is referred to as the built environment. The potential of the natural environment to sustain these anthropogenic changes while continuing to function as an ecosystem is an issue of major worldwide concern. Key environmental areas of interest include climate change, water supply and waste water, air pollution, waste management and hazardous waste, and land use issues such as deforestation, desertification, and urban sprawl.
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100,000-year problem is a discrepancy between the climate response (as measured by proxies for the temperature and extent of glaciations) and the forcing from the amount of incoming solar radiation, or insolation, which has little power on a 100,000 year ( 100 ka) timescale.
Due to variations in the Earth's orbit, the amount of insolation varies with periods of around 21,000, 40,000, 100,000, and 400,000 years. Variations in the amount of solar heating drive changes in the climate of the Earth, and are recognised as a key factor in the timing of initiation and termination of ice ages. Spectral analysis shows that the most powerful climate response is at 100,000‑year period, but the orbital forcing at this period is small.
- ... that each year in 22,500 cemeteries across the United States approximately 30 million board feet (70,000 m³) of hardwoods are buried as caskets?
A pile of bison skulls (circa 1870).
The North American bison were hunted almost to extinction in the 19th century and were reduced to very small numbers by the mid-1880s.
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The Wildlife Trusts partnership, or simply The Wildlife Trusts, is a partnership of 47 local wildlife trusts in the United Kingdom plus the Isle of Man and Alderney.
Wildlife Trusts are local organisations of differing size, history and origins, and can vary greatly in their constitution, activities and membership. However, all wildlife trusts share a common interest in wildlife and biodiversity, rooted in a practical tradition of land management and conservation. Almost all county wildlife trusts are significant landowners, with many nature reserves. Collectively they are the third largest voluntary sector landowners in the UK. The partnership's member trusts, between them, look after 2,200 nature reserves covering 80,000 square hectares.
Wildlife Trusts are local organisations of differing size, history and origins, and can vary greatly in their constitution, activities and membership. However, all wildlife trusts share a common interest in wildlife and biodiversity, rooted in a practical tradition of land management and conservation. Almost all county wildlife trusts are significant landowners, with many nature reserves. Collectively they are the third largest voluntary sector landowners in the UK. They often have extensive educational activities, and programmes of public events and education. The Wildlife Trusts centrally and locally also lobby for better protection of the UK's natural heritage, by becoming involved in planning matters and by national campaigning through the Royal Society of Wildlife Trusts. The trusts rely heavily upon volunteer labour for many of their activities, but nevertheless employ significant numbers of staff in countryside management and education. Thanks to their work promoting the personal and social development of young people, the Wildlife Trusts is a member of The National Council for Voluntary Youth Services (NCVYS).
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In all things of nature there is something of the marvelous.
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