To my dear visitors and commenters

Hi, everybody! I've noticed with lots of joy and happiness, that thousands of comments have been written in my posts. It's wonderful that so may people around the world appreciate my work. Therefore, I want to thank you for that and ,at the same time I want to ask you to be this blog's followers. It's fast and easy! Make it be even more visited and spread all over the world! I'm a woman, a teacher of English in Portugal, and I've been away for quite a long time because of my father's health. Unfortunately he died from Covid19 a few months ago. Now I felt it was time to restart my activity in this and other blogs I owe. I've recently created a new one in a partnership with a street photographer, Mr. Daniel Antunes. He's fabulous! https://pandpbydandd.blogspot.com I'd like you to visit it and, who knows, become our followers. The poems, chronicles and thoughts are all mine. Thank you so much! Kisses :-)

Search This Blog

Saturday, January 18, 2014

Peat bogs full of wildlife are under threat

Peat Bogs full of wildlife are being destroyed because of demands for peat.

Peat is super soil, it helps nourish plants, it's been used to flavour drinks, to purify water and heat houses.
Because it's so useful lots of people have tried to dig it up, destroying animal's natural habitat

From CBBC newsround


What is a bog?
A bog is a mire that accumulates peat, a deposit of dead plant material—often mosses, and in a majority of cases, sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, quagmire and muskeg; alkaline mires are called fens. They are frequently covered in ericaceous shrubs rooted in the sphagnum moss and peat. The gradual accumulation of decayed plant material in a bog functions as a carbon sink.
Bogs occur where the water at the ground surface is acidic and low in nutrients. In some cases, the water is derived entirely from precipitation, in which case they are termed ombrotrophic (rain-fed). Water flowing out of bogs has a characteristic brown colour, which comes from dissolved peat tannins. In general the low fertility and cool climate results in relatively slow plant growth, but decay is even slower owing to the saturated soil. Hence peat accumulates. Large areas of landscape can be covered many metres deep in peat. Bogs have distinctive assemblages of plant and animal species and are of high importance for biodiversity, particularly in landscapes that are otherwise settled and farmed.

What's peat?
Peat (turf) is an accumulation of partially decayed vegetation. One of the most common components is Sphagnum moss, although many other plants can contribute. Soils that contain mostly peat are known as a histosol. Peat forms in wetland conditions, where flooding obstructs flows of oxygen from the atmosphere, slowing rates of decomposition.

Mires, particularly bogs, are the most important source of peat, but other less common wetland types also deposit peat, including fenspocosins, and peat swamp forests. Other words for lands dominated by peat include moors, or muskegs. Landscapes covered in peat also have specific kinds of plants, particularly Sphagnum moss, Ericaceous shrubs, and sedges (see bog for more information on this aspect of peat). Since organic matter accumulates over thousands of years, peat deposits also provide records of past vegetation and climates stored in plant remains, particularly pollen. Hence they allow humans to reconstruct past environments and changes in human land use.
Peat is harvested as an important source of fuel in certain parts of the world. By volume, there are about 4 trillion m³ of peat in the world covering a total of around 2% of global land area (about 3 million km²), containing about 8 billion terajoules of energy. Over time, the formation of peat is often the first step in the geological formation of other fossil fuels such as coal, particularly low grade coal such as lignite.
Depending on the agency, peat is not generally regarded as a renewable source of energy, due to its extraction rate in industrialized countries far exceeding its slow regrowth rate of 1mm per year, and as it is also reported that peat regrowth takes place only in 30-40% of peatlands. Because of this, the UNFCCC, and another organization affiliated with the United Nations classified peat as a fossil fuel. However, the Intergovernmental Panel on Climate Change (IPCC) has begun to classify peat as a "slow-renewable" fuel. This is also the classification used by many in the peat industry.

in Wikipedia

Tuesday, January 14, 2014

Drones being tested to protect rhinos

Rhinos in Kenya could soon be protected by remote controlled helicopters kitted out with the latest gadgets.

Rhinos

A team of US engineers from Airware travelled to Kenya to test their drones in East Africa's largest black rhino sanctuary, Ol Pejeta.
Their remote controlled drones can fly anywhere in the park, sending live video back to base.
The drones also have a heat detecting camera which makes animals and poachers easy to spot.
It's zhoped devices like this will help park rangers keep a close eye on their animals, and deter poachers from hunting in the park.
Airware boss Jonathan Downey said: "We still have more development to do but we're extremely encouraged and quite proud to be pioneering drones that can preserve some of our planet's most threatened species."

CBBC newsround

Over the two-week test, Airware used three different drones: two fixed-wing aircraft and one flexible wing. "They were designed to operate completely autonomously, well out of the line of sight of the pilot," says Airware founder and CEO Jonathan Downey. Before the drones, park rangers had been using jeeps and small aircraft to patrol for poachers and check up on the animals. "Using drones allows them to spend a lot more time in the air, seeing a lot more detail, and for far cheaper than using traditional aircraft or jeeps," says the founder.





Sunday, January 12, 2014

Tackling China's smog problem

Officials in China say they're working hard to tackle the

 country's smog problem.

Child wearing a face mask
Many of China's big cities suffer with bad air pollution, which has recently caused some places to virtually shut down.
Plans to improve the smog situation include closing down coal-burning power stations and limiting the amount of traffic on roads.
One school in capital Beijing has even sealed off their playground with an inflatable tent!

                                                                            The pollution has become so bad that many people wear face masks.

From BBC Sci/ Environment


Wikipedia

Search results