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Portal:Environment

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Welcome to the Environment Portal
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Introduction

Land management has preserved the natural characteristics of Hopetoun Falls, Australia while allowing ample access for visitors.

The natural environment or natural world encompasses all biotic and abiotic things occurring naturally, meaning in this case not artificial. The term is most often applied to Earth or some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity. The concept of the natural environment can be distinguished as components:

In contrast to the natural environment is the built environment. Built environments are where humans have fundamentally transformed landscapes such as urban settings and agricultural land conversion, the natural environment is greatly changed into a simplified human environment. Even acts which seem less extreme, such as building a mud hut or a photovoltaic system in the desert, the modified environment becomes an artificial one. Though many animals build things to provide a better environment for themselves, they are not human, hence beaver dams and the works of mound-building termites are thought of as natural. (Full article...)

Land management has preserved the natural characteristics of Hopetoun Falls, Australia while allowing ample access for visitors.

The natural environment or natural world encompasses all biotic and abiotic things occurring naturally, meaning in this case not artificial. The term is most often applied to Earth or some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity. The concept of the natural environment can be distinguished as components:

In contrast to the natural environment is the built environment. Built environments are where humans have fundamentally transformed landscapes such as urban settings and agricultural land conversion, the natural environment is greatly changed into a simplified human environment. Even acts which seem less extreme, such as building a mud hut or a photovoltaic system in the desert, the modified environment becomes an artificial one. Though many animals build things to provide a better environment for themselves, they are not human, hence beaver dams and the works of mound-building termites are thought of as natural.

People cannot find absolutely natural environments on Earth,naturalness usually varies in a continuum, from 100% natural in one extreme to 0% natural in the other. The massive environmental changes of humanity in the Anthropocene have fundamentally effected all natural environments including: climate change, biodiversity loss and pollution from plastic and other chemicals in the air and water. More precisely, we can consider the different aspects or components of an environment, and see that their degree of naturalness is not uniform. If, for instance, in an agricultural field, the mineralogic composition and the structure of its soil are similar to those of an undisturbed forest soil, but the structure is quite different. (Full article...)

Hotspots of sulfate aerosol pollution in 2005–2007 are highlighted in orange. Such sulfates rarely occur naturally outside of volcanic activity, and their increased levels are the main cause of global dimming.

Global dimming is a decline in the amount of sunlight reaching the Earth's surface. It is caused by atmospheric particulate matter, predominantly sulfate aerosols, which are components of air pollution. Global dimming was observed soon after the first systematic measurements of solar irradiance began in the 1950s. This weakening of visible sunlight proceeded at the rate of 4–5% per decade until the 1980s. During these years, air pollution increased due to post-war industrialization. Solar activity did not vary more than the usual during this period.

As aerosols have a cooling effect, and global dimming has masked the extent of global warming experienced to date, with the most polluted regions even experiencing cooling in the 1970s. Global dimming has interfered with the water cycle by lowering evaporation, and thus has probably reduced rainfall in certain areas. It may have weakened the Monsoon of South Asia and caused the entire tropical rain belt to shift southwards between 1950 and 1985, with a limited recovery afterwards. Record levels of particulate pollution in the Northern Hemisphere caused or at least exacerbated the monsoon failure behind the 1984 Ethiopian famine. (Full article...)

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Credit: Cary Bass

Radioactive contamination is the uncontrolled distribution of radioactive material in a given environment. It is typically the result of a spill or accident during the production or use of radionuclides (radioisotopes). Contamination may occur from radioactive gases, liquids or particles. For example, if a radionuclide used in nuclear medicine is accidentally spilled, the material could be spread by people as they walk around. Radioactive contamination may also be an inevitable result of certain processes, such as the release of radioactive xenon in nuclear fuel reprocessing.

Current events

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Maathai in 2005

Wangarĩ Maathai (/wænˈɡɑːri mɑːˈð/; 1 April 1940 – 25 September 2011) was a Kenyan social, environmental, and political activist who founded the Green Belt Movement, an environmental non-governmental organization focused on the planting of trees, environmental conservation, and women's rights. In 2004 she became the first African woman to win the Nobel Peace Prize.

As a beneficiary of the Kennedy Airlift, she studied in the United States, earning a bachelor's degree from Mount St. Scholastica and a master's degree from the University of Pittsburgh. She went on to become the first woman in East and Central Africa to become a Doctor of Philosophy, receiving her Ph.D. from the University of Nairobi in Kenya. In 1984, she got the Right Livelihood Award for "converting the Kenyan ecological debate into mass action for reforestation." Wangari Maathai was an elected member of the Parliament of Kenya and, between January 2003 and November 2005, served as Assistant Minister for Environment and Natural Resources in the government of President Mwai Kibaki. She was an Honorary Councillor of the World Future Council. As an academic and the author of several books, Maathai was not only an activist but also an intellectual who has made significant contributions to thinking about ecology, development, gender, and African cultures and religions. (Full article...)

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The Water Supply and Sanitation Collaborative Council (WSSCC) was a United Nations-hosted organization contributing to Sustainable Development Goal 6, Target 6.2 on sanitation and hygiene. It was established in 1990 and closed at the end of 2020. WSSCC advocated for improved sanitation and hygiene, with a focus on the needs of women, girls and people in vulnerable situations.

WSSCC's main areas of focus were large-scale sanitation and hygiene behaviour change programmes through the Global Sanitation Fund. (Full article...)

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The following are images from various environment-related articles on Wikipedia.

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Kofi Annan
All our efforts to defeat poverty and pursue sustainable development will be in vain if environmental degradation and natural resource depletion continue unabated.

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London Smog
London Smog
  • ... 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?

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