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Fjords are a spectacular part of the Norwegian landscape. (Photo credit: Stefan Auth/imagebroker RF/Photolibrary)
Fjord is a Norwegian word describing a long, narrow inlet of water with steep cliffs on either side. Norway has the world’s highest concentrations of fjords. [Read more…]
Though picturesque, some crater lakes hide a deadly secret. (Photo credit: Harri’s Photography/Flickr Open/Getty Images)
August 21, 1986 started out as a normal day near Cameroon’s Lake Nyos. By the end of the day, however, 1746 people and 3500 livestock in the area would be dead. The cause of the catastrophe was, of all things, an exploding lake. But what caused the lake to explode? More importantly, could it happen again? [Read more…]
Geothermal energy is a significant part of Iceland’s renewable energy program. (Photo credit: naten/Shutterstock)
Iceland is known for its dramatic fire and ice landscape. Visitors come from all over the world to soak in the island nation’s thermal pools, which are heated naturally by underground plumes of magma. However, this geothermal energy is harnessed for more than just recreational purposes – it is also used as an important source of renewable energy in the country and even beyond its borders. [Read more…]
Gwynt y Môr is the second largest offshore windfarm in the world. (Photo credit: philipbird123/Fotolia)
Gwynt y Môr (which translates to “wind of the sea” in English) is the second largest offshore wind farm in the world. It is located about 13 kilometers (8 miles) off the coast of north Wales near Colwyn Bay and covers an area of 80 square kilometers (about 30 square miles). [Read more…]
Tasmanian devils are currently threatened by a cancerous facial disease. (Photo credit: ©FiledIMAGE/Shutterstock)
Tasmania, an island located off the southeastern coast of Australia, is home to the Tasmanian devil. Unlike the human adult sized cartoon version, the real Tasmanian devil is only 20-31 inches (51-79 cm) tall and weighs between 9 and 26 pounds (4-12 kg).
While fossil evidence indicates that Tasmanian devils were once found on the Australian mainland, research indicates that the animals went extinct there 400 years ago due to increasingly arid conditions and the spread of the dingo, a type of wild dog. Tasmanian devils were nearly hunted to extinction on Tasmania during the late 1800s and early 1900s as they were considered to be pests by early settlers. The animals were placed under formal legislative protection in June 1941.
Though the Tasmanian devil bears no resemblance to its cartoon counterpart, it does share its terrible disposition. When the animal feels threatened, its puts on an aggressive display of growling, lunging, and baring its teeth. It earned its “devil” name from early settlers after hearing its “otherworldly” scream. However, while it may be aggressive to potential predators, Tasmanian devils tend to be fairly timid and are typically not a threat to people.
Tasmanian devils are nocturnal animals, which means they are active at night. They are carnivorous and generally feed on birds, snakes, fish, insects, and the remains of dead animals. They do not let any food go to waste – they eat the bones, tissue, muscles, and organs of their prey.
Like kangaroos and wombats, Tasmanian devils are marsupials. The animals breed once a year in March. After a three-week gestation period, between 20 and 30 rice-sized young are born. The young, called imps, must race to their mother’s pouch to claim one of her four teats; the majority are too slow and do not survive. The young devils stay in their mother’s pouch for four months, after which they are carried on their mother’s back. The young are fully grown after about nine months.
While in the mid 1990s, there was a surge in the Tasmanian devil population, that time period also coincided with the appearance of a disease called devil facial tumor disease (DFTD). This cancerous disease causes tumors to form on the animal’s face, which makes it difficult for it to eat, leading to starvation. Since 2001, the Tasmanian devil population has declined 60 percent.
Scientists are working to save the species from extinction. To do so, they are sequestering healthy populations to prevent the spread of disease. They are also focusing on captive-breeding programs. Currently, over 20 Australian organizations are involved in captive-breeding efforts and more than 600 Tasmanian devils have been bred in captivity.
More to Explore
Tasmanian Devil Natural History
Tasmanian Devil FAQs
Save the Tasmanian Devil
National Geographic: Tasmanian Devil
Visibility was reduced to less than three feet in parts of the city during the killer London Fog event of 1952 (Photo credit: Bettmann/Getty Images)
Though London is well known for its overcast and foggy weather, the fog that enveloped the city for four days in 1952 was a fog like no other. By the time the fog lifted, at least 4000 people were dead and more than 100,000 people had been hospitalized. In addition, thousands of animals, including many livestock, also died. What caused this particularly deadly fog has long been unknown. Now scientists think they have finally solved the mystery behind the killer fog. Their findings may help prevent a similar event from occurring in modern-day China, which is home to 16 of the 20 most polluted cities in the world. [Read more…]
Water scarcity is expected to be a major issue in Egypt in the upcoming years. (Photo credit: Lin Sen/Shutterstock)
Egypt, located in northeastern Africa, has an arid climate. Only 6 percent of the country is arable and agricultural land; the rest of the country is desert. Over the past 60 years, Egypt’s population has grown by more than 60 million people. Researchers suggest that by 2050, the population could reach between 120 and 150 million. Given Egypt’s growing population and its arid climate, environmental scientists warn a water crisis is quickly approaching.
The main source of fresh water in Egypt is the Nile River. While the country is positioned at the end of the river’s flow, through agreements with Sudan, Egypt is entitled to 55.5 billion cubic meters of water per year. In Egypt, the Aswan High Dam, built in the 1960s, controls the flow of the Nile River.
Little rainfall occurs in Egypt. Most rains occur during the winter along the country’s coastal region. The total amount of rainfall ranges between 80 and 200 mm per year. Because of the unpredictability of precipitation, it cannot be relied upon as a source of fresh water.
Groundwater in Egypt is stored in aquifers, but due to their deepness and relative inaccessibility, groundwater is also not a reliable source of water. Desalination of the sea is another potential source of fresh water. However, the process is only currently economically viable in tourist developments along the Red Sea, where the value of fresh water is so high that it is enough to cover the cost of desalination.
As the population in Egypt grows, so too does the demand for fresh water. Research indicates that by the year 2020, Egypt will be consuming 20 percent more water than is available. Experts warn that this extreme scarcity could lead to political instability.
Another water issue faced in Egypt is the availability of clean water. Along the river’s course, the Nile is heavily polluted by agricultural runoff, industrial effluent, and municipal sewage. Managing these sources of pollution will be key to ensuring access to clean water for the Egyptian population.
While the future may appear bleak, there are a few measures that can be taken now to help ensure there is water in the future. Because the agricultural sector uses the most water, it is also the area where more water could be conserved. Many farmers utilize flood irrigation to water their crops; experts recommend switching to drip irrigation, which would decrease the amount of water lost to evaporation. Switching to more water-efficient crops would also use less water. Changing planting dates to coincide better with natural climate patterns, such as planting cotton during cooler months rather than hotter ones, could also help to reduce the total amount of irrigation needed.
More to Explore
RISE Encourages Local Farmer Strategies to Combat Water Scarcity
Egypt’s Water Crisis – Recipe for Disaster
Water Scarcity in Egypt: The Urgent Need for Regional Cooperation among the Nile Basin Countries
Water Issue in Egypt: Resources, Pollution and Protection Endeavors
While EcoZine is on summer vacation, we are posting articles from the archives. This article first appeared in March 2015.
The komodo dragon is a reptile endemic to Indonesia’s Lesser Sundra Islands. (Photo credit: Wolfgang Kaehler/Alamy)
The Komodo dragon, like its name suggests, is a ferocious animal. It is the largest lizard in the world—as an adult it may grow to a length of ten feet and weigh over 150 pounds. [Read more…]
A rise in popularity has led to a steep decline in global Bluefin tuna populations. (Photo credit: FLPA/Alamy Stock Photo)
Once deemed worthy only as an ingredient for cat food, Bluefin tuna is now considered a highly regarded ingredient that catches top dollar at sushi restaurants around the world. Unfortunately, a rise in popularity also coincides with a steep decline in global Bluefin tuna populations. [Read more…]
Greenland is home to the world’s second largest ice sheet, and it is melting at an alarming rate – 287 billion metric tons of ice is disappearing every year. (Photo credit: Global Warming Images / Alamy Stock Photo)
Greenland is home to the world’s second largest ice sheet, and it is melting at an alarming rate – 287 billion metric tons of ice is disappearing every year. Several factors contribute to ice sheet melting, including changes in air temperature, water temperature, and precipitation. New research indicates that there is a fourth factor to consider: cloud cover. [Read more…]