Category Environtal Studies

What are ice circles?

A rare natural phenomenon, ice circles are observed mainly in Scandinavia and North America.

Ice circles are thin, perfectly round discs of ice which float on slow flowing water. It is a rare natural phenomenon that is observed mainly in Scandinavia and North America. Ice circles were first mentioned in 1895 in Scientific American, a popular magazine.

Scientists are not yet clear as to how ice circles are formed. It is thought that they are formed on the outer bends in a river. The slow moving river currents create rotating eddies which grind a free piece of ice against the ice that is connected to shore. Due to the water’s swirling motion, the chunk of ice becomes perfectly circular in shape.

In May 2009, astronauts aboard the International Space Station noticed the formation of two ice circles in Lake Baikal, Russia.

UFO enthusiasts, however, like to think that like crop circles, they are the creations of visiting aliens!

Picture Credit : Google 

What are cloud forests?

Cloud forests are usually found in tropical rainforests of South America, Southeast Asia and Africa.

A cloud forest is constantly enveloped by dense clouds that penetrate right through the ground. This creates some unique conditions- very moist and misty environment, thick vegetation with a lot of moss growth, boggy forest floors, constant sounds of water dripping (from fog that condenses and falls off the leaves) and very low visibility.

Cloud forests are usually found in tropical rainforests of South America, Southeast Asia and Africa. These forests are also referred to as fog forests, or moss forests. Cloud forests attract researchers who like to study the abundant species of water-loving plants, animals and birds that are found there. They are a source of pure fresh water.

A large percentage of the biodiversity contained within these forests is yet to be catalogued. Species thought to be extinct have been discovered in these forests.

Some of the cloud forests have become popular travel destinations. The Monteverde Cloud Forest Reserve is referred to as one of the “seven wonders of Costa Rica” and it attracts about 70,000 tourists annually. It is known to contain the largest number of orchids in the world. Cloud forests are now a concern for conservationists and The Cloud Forest Agenda Report of the UNEP and UNESCO seeks to initiate action to preserve cloud forests.

Picture Credit : Google 

What are the solutions for a warming world?

With a warming planet searing us, we are desperate to find cool solutions. In a seeming paradox what contributed to the climate change crisis such as coal plastic and oil rigs also hold the key to eco-friendly solutions. But how? Let’s find out…

Coal is a fossil fuel that is largely blamed for the current climate change crisis. Now, in a seeming paradox, energy experts are turning to long-abandoned coal mines as a source of carbon-free power! These mines are estimated to contain millions of gigawatt hours or GWh of heat, with the potential to store more. Today, there are many ongoing projects across the UK and in Europe to tap this energy source, especially in places where plants that treat toxic mine water from closed mines already exist.

Once a mine is shut down, the shafts fill with water. The water may be surface water (from rainfall or flooding), or groundwater that seeps up from below. The water is naturally warm as it is deep underground, with temperatures ranging from 15 degrees C to 20 degrees C. It is hot enough to heat homes in winter and cool enough to keep them mild in summer. Mine water energy is also 10 per cent cheaper.

It is not a new idea. In 1989, a packaging firm in the town of Springhill, in the Canadian province of Nova Scotia, dug the world’s first borewell to draw up water from dormant coal mines near it to heat its office building.

Futuristic fabric

An American apparel startup called LifeLabs Design set up by a research team from Stanford University, has created clothing from polyethylene (PE) that keeps the wearer’s skin cool in the heat and warm in the cold. The first is called Cool life and the second, you guessed it, WarmLife!

Polyethylene is the type of plastic found in cling wrap and the thin, transparent bags used by grocery stores to pack items. The inventors discovered that the plastic allowed infrared radiation to pass right through it. Most fabrics trap infrared radiation or heat generated by the skin. CoolLife fabric lowers the wearer’s skin temperature by at least 1 degree Celsius when compared to cotton.

The company’s WarmLife fabric works on the principle of reflectivity. The side that touches the skin has a ‘nano coat’ or a microscopic aluminium layer that reflects the body’s infrared radiation and traps that heat inside an inch-thick layer of insulation. The fabric is 30 per cent warmer than clothing of similar weight and bulk.

The company’s WarmLife fabric works on the principle of reflectivity. The side that touches the skin has a ‘nano coat or a microscopic aluminium layer that reflects the body’s infrared radiation and traps that heat inside an inch-thick layer of insulation. The fabric is 30 per cent warmer than clothing of similar weight and bulk.

Polyethylene is the most sustainable among synthetic and natural textiles. The fabrics made from PE are ecologically friendlier than other synthetic and even natural fabrics. Polyester, wool and cotton use large amounts of fuel and water in their entire production process. WarmLife jackets and vests use much less fuel and water in their manufacture. The fabric is 97 per cent recycled material from single-use plastics.

Rigs to reefs

There are more than 12,000 offshore oil and gas platforms worldwide. There comes a time when the rigs produce too little oil and gas for extraction to be profitable. The well is sealed off, but it is too expensive to dismantle the massive structure entirely. The platform which is above the surface is easier to cart away, but the huge steel pylons below it are not. One would expect these rusting hulks to damage marine ecosystems, but surprisingly, they have had the opposite effect!

Offshore oil and gas rigs that have been decommissioned have become safe havens for a variety of marine life! The subsurface rig (the part below the water) provides the ideal skeleton for coral reefs to build on! Decommissioned oil rigs in America are the most productive man-made marine habitats in the world. They provide marine wildlife with food, shelter from predators and a safe breeding ground.

Since 1984, the U.S. government has encouraged states to turn defunct rigs into reefs. Oil companies on the east coast in Alabama, Florida, Louisiana, Mississippi and Texas, have converted more than 500 rigs into artificial reefs. In fact, the rigs in the Gulf of Mexico have become hotspots for diving, snorkelling and recreational fishing.

Picture Credit : Google 

Have you heard about a tree that looks like a painting?

Have you heard about a tree that looks like a painting? Legend even has it that Robin Hood took shelter in a tree. Here we bring you some of the unique trees in the world.

AFRICAN BAOBAB – AFRICA

These ancient trees have been around even before humans walked the earth. They date back thousands of years and are endemic to the African savannah. These baobabs grow into colossal sizes and are life-sustaining trees. This tree species is referred to as the Tree of Life for the shelter, food and water it provides during inclement weather conditions.

THE MAJOR OAK TREE- THE UK

This is Robin Hood’s tree. Remember the legend of Robin Hood and how he took shelter in a tree and hid from the Sheriff of Nottingham? Well, this Oak tree, which is the largest in the U.K., is the infamous tree that provided shelter. The tree is hollow inside and has a hole in its trunk. Nuzzled in the Sherwood Forest Country Park, this 1,000-year-old hollow oak tree gets many visitors. Seen here is the Robin Hood’s Larder tree from an 1880 postcard.

LONE CYPRESS TREE – THE U.S.

Lone Cypress is perhaps the most photographed tree in the world. As the name suggests, this tree stands all alone, standing sentinel on the Californian coast. The tree is believed to be over 250 years old and is perched on the rocky ledge along the 17 Mile Drive on Pebble Beach in Monterey County.

RAINBOW EUCALYPTUS

Northern Hemisphere Picture this. A tree cloaked in a rainbow. The tree looks like a painting with a multitude of colours splashed right across it. Christened the rainbow eucalyptus, these rare eucalyptus trees are indigenous to the northern hemisphere. When the bark of the tree peels off during each season, out pops the coloured bark which ages as it with the elements producing the brilliant hues. Commonly called Rainbow Eucalyptus, the species goes by the name Eucalyptus deglupta. The tree is commonly found in Philippines, New Guinea, and Indonesia.

WANAKA TREE – NEW ZEALAND

Hundreds flock to this place every year to get a picture of the Wanaka Tree that seems to rise out of the placid waters of lake Wanaka, New Zealand. Evenings are the best time to visit the place as it always offers postcard-perfect views. The tree is often called That Wanaka Tree’. This loner of a willow tree set against a panoramic vista of the mountains of the Southern Alps makes for a resplendent sight.

THE BOAB ‘PRISON’ TREE-AUSTRALIA

This is a huge Boab tree with a large hollow. The tree is believed to be more than a thousand years old and is found in Derby, Kimberley, Western Australia. Known for decades as the Boab Prison Tree, the tree gets its name after the legend that it was used as a lockup for Aboriginal prisoners. But researchers have maintained that there is no evidence for this and have been pushing for appropriately naming the tree.

Picture Credit : Google 

What are the few successful programmes taken up in the country for the conservation of birds-both residents and migrants?

The Phansad Wildlife Sanctuary in Maharashtra was in the news recently for setting up a ‘food centre’ with carrion to revive vulture population. Such measures are important because birds are integral to a healthy and balanced ecosystem. Let’s look at a few successful programmes taken up in the country for the conservation of birds-both residents and migrants.

Amur falcon

Even as our country battled the horrific second wave of the pandemic in April 2021, Tamenglong, a town in Manipur, found a reason for excitement tracking two radio-tagged migratory Amur falcons (named Chiulon and Irang) flying over the Arabian Sea. Amur falcons cover 20,000 km between their wintering grounds in Africa and breeding grounds in China. And, thanks to the radio-tagging of two of those birds back in 2019. people were tracking this historic journey and hoping for the birds to reach their town safely later. However, about a decade earlier, the story in neighbouring Nagaland was completely different. For years, lakhs of these raptors have stopped in India’s northeastern regions such as Nagaland during their long migration. But what was a stopover for rest and recuperation turned into a death trap for them-in 2012, more than one lakh birds were said to have been hunted for meat. Following this decimation, the Nagaland Wildlife and Biodiversity Conservation Trust swung into action-went door-to-door talking with villagers and engaged with village about the need to protect the birds. And those earnest efforts paid off. The killings stopped in what is seen as one of the most telling changes in people’s attitude towards wildlife conservation. Recently, there have been reports of increasing Amur falcon numbers not just in Nagaland, but also in neighbouring States such as Assam. Meghalaya, and of course, Manipur where people waited with bated breaths for the return of raptors named Chiulon and Irang.

Great Indian bustard

Recently, four female great Indian bustards at the Desert National Park (DNP) in Jaisalmer, Rajasthan, made headlines for laying two eggs each. Critically endangered, these bustards are known for laying only one egg at a time. Turns out this time was different because, thanks to excessive rains in the region, the grass in which the birds laid their eggs was abundant. In addition, the moisture and humidity led to an increase in insect population, which made for the birds hearty meals.

Experts believe one of the other reasons for the two-egg clutch is also the conservation efforts. The first major initiative for saving the species came about in 2013 with the Rajasthan government setting up Project Great Indian Bustard at DNP, which included increased protection for the birds and less human presence in the region. Further, a breeding centre for the birds was set up at DNP in 2019.

Endemic to India, great Indian bustards were once seen across several States. Due to hunting, habitat loss, and accidents caused by windmills and overhead lines, their numbers kept dwindling. With only about 150 birds remaining today, two egg clutches and conservation initiatives hold promise for the bird’s future.

Vultures

In October 2020, when eight critically endangered, captive-bred, white-rumped vultures were released into the wild in Haryana, it was a first for our country. The release was the result of a two-decade conservation programme that saw the setting up of four vulture conservation breeding centres – one each in Haryana, West Bengal, Assam, and Madhya Pradesh. The centres were set up by the Bombay Natural History Society (a wildlife research organisation), in association with the Government of India. State Forest Departments, and Royal Society for the Protection of Birds Launched to conserve three species of vultures-oriental white-backed vulture (also known as white-rumped vulture), long-billed vulture, and slender billed vulture- these centres have together reared hundreds of these birds. Since 2020, many more birds have been released into the wild.

It is believed that “India was home to 40 million vultures in the 1980s”. Their number plunged by over 97% in the 1990s, largely due to the drug diclofenac used to treat cattle-whose carcass vultures mainly fed on. With a ban on diclofenac in place and the setting up of these breeding centres (along with creating Vulture Safe Zones in several parts of the country), there’s much hope for these birds today.

VISIONARY PERSPECTIVE PLAN (2020-2030)

  • In 2020, the government came out with a 10-year plan “for conservation of avian diversity, their ecosystems, habitats & landscapes in the country”.
  • It aims to initiate steps for the protection of migratory birds, conservation of wetlands, and focus on birds in urban areas.
  • It also plans to undertake detailed ecological studies of rare, endangered, and threatened bird species of India and their habitats and to develop and implement conservation measures and Species Recovery Plans.

Picture Credit : Google 

How much impact does aviation have on climate change is it the most polluting form of travel?

The impact of flying on climate change has been well established. On average, the aviation industry generates about 1 billion tons of CO2 worldwide every year. This number is comparable to that of Japan, which is the world’s third largest economy.

Add to this the fact that global emissions from flights have been increasing at the rate of 2.5% every year. In fact, over the next 30 years, the aviation industry will likely produce more CO2 than that of its whole history!

Radical solutions required

Even though fossil fuels are increasingly being replaced by renewable energy sources in power generation and electric vehicles continue to grow into a bigger market, there hasn’t been enough done to address pollution from aircraft. In such a climate, the need is for bold, radical solutions. Researchers from the University of California San Diego School of Global Policy and Strategy have called for the same through a new commentary article that appeared in Nature in September.

The authors suggest that the two most commonly proposed solutions-carbon offsetting and cleaner fuels – are rather inadequate. While offsetting falls flat owing to poor accountability, cleaner fuels can’t yet be produced sustainably in large volume and low costs to replace all jet fuel. Additionally, these two solutions do not address the dimate impact of contrails-clouds produced by aircraft engine edhaust – that can trap heat radiating from the Earth’s surface.

Three steps

To address a warming planet, the authors suggest three steps for the industry as a whole. Firstly, they recommend the industry and various governments to work together to be more aware of the risks involved and the role that aviation plays in the dimate crisis.

Next up, they wish for collaborations between the most motivated governments and firms to take risks on new technologies, which could then inspire others to follow their lead. The authors only provide examples such as a partnership between the Norwegian government and businesses to create electric airplanes, but also lay out strategies of how collaborations could be used to ignite other advances.

Finally, they stress the importance of research, not just to better understand contrails and chemical interactions in the atmosphere, but also to provide solutions. They envision these solutions to not just be technological, but also economic and political, thereby providing for a greener future.

Picture Credit : Google